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Renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, view of large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Petrochemical industries and projects, working in the field of petroleum engineering, a picture from the back of a group of Gulf engineers wearing protective suits and helmets assessing the quality of oil factories in the Kingdom of Saudi Arabia, an oil and gas refining plant in the industrial area
Extracting underground resources from the sea, oil and gas refineries in the industrial zone in Saudi Arabia, petrochemical industries and projects in the Kingdom, huge machines and heavy equipment used in oil exploration, working in the field of petroleum engineering, Saudi economic growth and progress
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Oil and gas refineries in the industrial zone in Saudi Arabia, Extracting underground resources from the sea, Petrochemical industries and projects in the Kingdom, Huge machines and heavy equipment used in oil exploration, Working in the field of petroleum engineering, Saudi economic growth and progress
The concept of petroleum engineering in the Gulf States, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia, petrochemical industries and projects
The concept of gas production in the Kingdom of Saudi Arabia, following up on the progress of work in factories, Saudi professions and jobs, two Saudi Gulf Arab engineers wearing helmets and protection vests standing in an oil refining factory
Renaissance of the Saudi national economy, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, metal towers and structures in desert lands.
Petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Supervising oil plants and factories in Saudi Arabia, back view of a Saudi Arabian Gulf worker wearing a protective suit and helmet, pipelines extending from the depths of the sea to the refineries, working in the field of petroleum engineering, oil and gas refinery
Modern techniques and technology in oil and gas production in the Kingdom of Saudi Arabia. Rear view of a Saudi businessman wearing a thobe and wearing a ghutra and agal watching the progress of factory work, large buildings with many pipes and steam rising in the sunlight, blue sky with clouds, Saudi professions and jobs in the background of an oil refinery
Smoke rising from factories and polluting the environment, industrial plants in the Kingdom of Saudi Arabia, development industries contributing to the renaissance of the Saudi national economy, large and huge warehouses and tanks, an industrial station with towers and metal structures at sunset, reliance on local national production
Petrochemical industries and projects, working in the field of petroleum engineering, close-up from the back of a group of Gulf engineers wearing protective suits and helmets assessing the quality of oil plants in the Kingdom of Saudi Arabia, oil and gas refining plant in the industrial area
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Factories and plants in Saudi Arabia, Oil and gas refinery in industrial area, Steel pipelines and cables, Petrochemical industries and projects, Pollution resulting from oil production, Huge and large warehouses, Industrial engineering and equipment
Petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and factories in the Kingdom of Saudi Arabia, gas refinery, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks.
Oil and gas refinery, supervising oil plants and factories in Saudi Arabia, back view of two Saudi Arabian Gulf workers wearing orange protective suits and helmets, pipelines extending from the depths of the sea to the refineries, working in the field of petroleum engineering
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Petrochemical projects contributing to the renaissance of the Saudi national economy, sunset view of the sky with high illuminated structures, petroleum engineering field in the Gulf countries, oil and gas refinery, oil factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses and tanks
Metal towers and structures at night, industrial equipment in warehouses and large tanks, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, oil factories and laboratories in the Kingdom of Saudi Arabia
Pipelines and steel equipment, factory and laboratory engineering in the industrial zone in the Kingdom of Saudi Arabia, petrochemical industries and projects, huge and large warehouses,
Large and massive warehouses and tanks, lighting towers and metal structures at night, oil factories and laboratories in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy
Renaissance of the Saudi national economy, quality of machinery and equipment in the factories extracting oil wealth from the depths of the seas, petrochemical industries and projects, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Petrochemical industries and projects, oil and gas refining plant in the industrial area, factories and plants in the Kingdom of Saudi Arabia, industrial engineering and equipment, huge and large warehouses, view of smoke from factories in the air at sunset, steel pipelines and cables
Steel Pipelines and Cables, Huge and Large Warehouses, Petrochemical Industries and Projects, Large Oil Refinery with Complex Machinery, Factories and Plants in Saudi Arabia, Oil and Gas Refining Plant in Industrial Area
Oil and gas refinery, petroleum engineering concept in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia
Follow up the progress of work in factories and plants, a group of Saudi Arabian Gulf engineers working in an oil and gas refining plant, working in the field of petrochemical industries and projects, steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia
Work in the field of petroleum engineering, oil and gas refining plants in the industrial zone in Saudi Arabia, extracting underground resources from the sea, petrochemical industries and projects in the Kingdom, huge machines and heavy equipment used in oil exploration, Saudi economic growth and progress.
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Machinery and equipment in oil extraction plants from the depths of the seas, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery, the renaissance of the Saudi national economy, petrochemical industries and projects
Monitoring the progress of factory operations, engineering professions and jobs, quality of oil production plants and equipment, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, petrochemical industrial projects, close-up of a Saudi Arabian Gulf engineer wearing a safety helmet holding a tablet in his hand
Petrochemical industries and projects, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and plants in the Kingdom of Saudi Arabia
Steel Pipelines and Cables, Petrochemical Industries and Projects, Pollution from Oil Production, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
Oil factories in the Kingdom of Saudi Arabia, the quality of machinery and equipment in the plants that extract oil wealth from the depths of the seas, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy
Oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of petroleum production plants and equipment.
Factories and plants in Saudi Arabia, huge and large warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area
Saudi laboratories and factories, work in the industrial engineering sector, a close-up photo of a Saudi Gulf Arab engineer wearing a jacket and a protective helmet standing with crossed hands at his workplace, youth engineering professions and works, standing confidently and looking at the camera
Quality of oil production plants and equipment, supervision of oil refining in the Kingdom of Saudi Arabia, petrochemical industrial projects, a picture of two Saudi Gulf Arab engineers wearing a protective helmet, following up on the progress of the factory’s work
Youth engineering professions and works, Saudi laboratories and factories, work in the industrial engineering sector, a close-up photo of a Saudi Gulf Arab engineer wearing a protection helmet repairing equipment and machines in the factory
Huge cranes and drilling machines for extracting oil and oils, an excavator that explores for oil in the desert during the day, import and export of underground resources, quality tools and equipment for manufacturing and storing petroleum.
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands
Towers and metal structures in desert lands, large and huge warehouse tanks, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories in the Kingdom of Saudi Arabia
Quality of oil production plants and equipment, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, cartoon drawings of a Saudi Gulf Arab engineer wearing a protective helmet, following up on the progress of factory work, engineering professions and jobs, petrochemical industrial projects
Pipelines extending from the depths of the sea to the refineries, working in the field of petroleum engineering, oil and gas refinery, supervising oil plants and factories in the Kingdom of Saudi Arabia, a picture from the back of two Saudi Arabian Gulf workers wearing protective suits and protective helmets
Towers and metal structures in the lands, the renaissance of the Saudi national economy, desert, large and huge warehouses and tanks, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia
Exploration for underground resources in the Kingdom of Saudi Arabia, development of the Saudi economy, huge drilling machines used in petroleum extraction, petrochemical industries and projects in the Kingdom, pipelines and heavy steel equipment, work in the field of industrial and petroleum engineering.
Oil factories and factories in the Kingdom of Saudi Arabia, lighting towers and metal structures at night, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Skill in mastering work in the blacksmith factory, steel production line factories and various raw metals in the Kingdom of Saudi Arabia, a group of Saudi Arabian Gulf blacksmiths wearing protective clothing and helmets are welding iron, heavy machinery and equipment
Following up on the progress of the factory’s work, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, a side photo of a Saudi Gulf Arab engineer wearing a protective jacket and helmet working on the oil refinery at sunset, the quality of oil production laboratories and equipment, Saudi professions and jobs
Following up on the progress of the factory’s work, cartoon drawings of a Saudi Gulf Arab engineer wearing a protective helmet, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, engineering professions and jobs, petrochemical industrial projects
Petrochemical industries and projects, pollution resulting from oil production, steel pipelines and cables, oil and gas refinery in the industrial area, factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Oil refineries in Saudi Arabia, petrochemical projects contributing to the renaissance of the Saudi national economy, gas plants and refineries, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks
Large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Petrochemical industries and projects in the Kingdom, Extraction of underground resources from the sea, Huge machines and heavy equipment used in oil exploration, Work in the field of petroleum engineering, Oil and gas refining plants in the industrial zone in Saudi Arabia, Saudi economic growth and progress
Oil and gas refinery, lighting towers and metal structures, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Adoption of modern techniques and technology in oil and gas production, oil mines on soft golden sands, engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, harsh and dry climate, petrochemical industries and projects, huge and modern tools and equipment
Steel Pipelines and Cables, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Huge and Large Warehouses, Saudi National Economy Renaissance, Petrochemical Industries and Projects
Huge industrial facilities illuminated at dawn, quality of petroleum production laboratories and equipment, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metal and chemical industries
The field of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, the view of the sky at sunrise with high illuminated structures
A large truck drives on the soft golden sands of the Saudi Arabian desert, transporting oil from production sites to distribution stations or refineries, the importance of the energy sector in the economy
Follow-up of work progress in factories, side view of a Saudi Arabian Gulf engineer wearing a helmet, protective vest and mask standing in front of pipelines, gas production concept in Saudi Arabia, Saudi jobs and professions, oil refinery background
Oil and gas refining plant in the industrial zone, petrochemical industries and projects, pipelines and steel cables, factories and laboratories in the Kingdom of Saudi Arabia, a large oil refinery equipped with complex machinery in a vast desert landscape and distant mountains, engineering and industrial equipment, huge and large warehouses.
Saudi jobs and professions, monitoring the progress of work in factories, close-up photo from the back of a Saudi Arabian Gulf engineer wearing a traditional thobe and shemagh standing between pipelines at sunset, the concept of gas production in the Kingdom of Saudi Arabia, background of an oil refinery
Follow up the progress of work in factories, the concept of gas productivity in Saudi Arabia, metal and chemical industries, steel cables and pipelines, work in the field of petrochemical industries and projects, a group of Saudi Gulf Arab engineers working in an oil and gas refining plant
Gas production concept in Saudi Arabia, side view of a Saudi Arabian Gulf engineer wearing a jacket and a protective helmet working in an oil refinery, monitoring the progress of work in the factories at sunset, working in the field of petrochemical industries, pipelines and steel cables
Monitoring the progress of work in factories, the concept of gas productivity in the Kingdom of Saudi Arabia, Saudi jobs and professions, a close-up photo from the back of a Saudi Gulf Arab engineer wearing a helmet and a protective vest standing between pipelines at sunset, the background of an oil refining factory
Raw metal factories in Saudi Arabia, skill in mastering work in the blacksmith factory, a Saudi Arabian Gulf blacksmith wearing protective clothing welds iron, production line of steel and various metals, heavy machinery and equipment
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Huge and large warehouses, petrochemical industries and projects, steel pipelines and cables, a large oil refinery equipped with complex machines in a vast desert landscape and distant mountains, factories and plants in Saudi Arabia, oil and gas refining plant in the industrial area
Concept of work in the industrial engineering sector, close-up from the back of a Saudi Arabian Gulf engineer wearing a helmet and a safety vest supervising work via a tablet, oil refineries in Saudi Arabia, modern technologies in oil and gas production
Machinery and equipment in oil extraction plants from the depths of the seas, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery, the renaissance of the Saudi national economy, petrochemical industries and projects
An oil and gas platform for extracting oils, petrochemical industries and projects, the renaissance of the Saudi national economy, an excavator performing exploration, the quality of machinery and equipment in factories that extract oil wealth from the depths of the sea, the concept of petroleum engineering
Petrochemical projects and industries, close-up of a Saudi Arabian Gulf worker wearing a safety helmet and goggles monitoring the operation of machines, quality of manufacturing and production in the Kingdom's factories, management and supervision of the manufacturing mechanism, Saudi professions and jobs
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Oil factories and plants in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, lighting towers and metal structures, oil and gas refinery, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Introducing women into the field of industrial engineering, a close-up of a Saudi Arabian Gulf woman wearing a hijab supervising and monitoring the operation of equipment and machines inside the laboratory
Pollution from petroleum production, petrochemical industries and projects, steel pipelines and cables, oil and gas refinery in industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Oil factories in Saudi Arabia, quality of oil production plants and equipment, huge illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, a sky full of stars
Following the progress of work in factories, a close-up photo from the back of a Saudi Gulf Arab engineer wearing a helmet and a protective vest standing between pipelines at sunset, the concept of gas production in the Kingdom of Saudi Arabia, Saudi professions and jobs, background of an oil refining factory
Steel and various metals production line, raw metal factories in Saudi Arabia, skill in mastering work in the blacksmith factory, a Saudi Arabian Gulf blacksmith wearing protective clothing welds iron, heavy machinery and equipment
Standing confidently and looking at the camera, achieving the industrial revolution, Saudi laboratories and factories, working in the industrial engineering sector, a close-up photo of a Saudi Gulf Arab engineer wearing a helmet and safety glasses standing with crossed hands in his workplace, youth engineering professions and works
Steel Pipes and Cables, Oil and Gas Refinery Plant in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment, Petrochemical Industries and Projects
Huge industrial facilities illuminated at dawn, quality of petroleum production laboratories and equipment, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metal and chemical industries
Youth professions and jobs in the Western Kingdom of Saudi Arabia, work in the industrial field, a close-up photo from the back of a Saudi Gulf Arab engineer wearing a jacket and a protective helmet walking around the factory, factories of the Kingdom of Saudi Arabia, supervision and auditing in industrial laboratories
Petrochemical industrial projects, monitoring the progress of factory work, quality of oil production laboratories and equipment, supervising oil refining in the Kingdom of Saudi Arabia, a picture of two Saudi Gulf Arab engineers wearing a protective jacket and helmet at the work site
Huge industrial facilities illuminated at dawn, quality of petroleum production laboratories and equipment, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metal and chemical industries
Lighting towers and metal structures at night, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Industrial engineering and equipment, oil and gas refining plant in industrial area, steel pipelines and cables, petrochemical industries and projects, aerial view from above of power generation and waste recycling plants in Saudi Arabia ports, huge and large warehouses
Oil factories and factories in the Kingdom of Saudi Arabia, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks, petrochemical industries and projects, the renaissance of the Saudi national economy
Steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia, monitoring the progress of work in factories and plants, a group of Saudi Gulf Arab engineers working in an oil and gas refining plant, working in the field of petrochemical industries and projects
Professional photography of a crude oil plant in Saudi Arabia, highlighting industrial architecture, close-up of a modern and bright oil refinery, advanced technical equipment and tools, petrochemical industries and projects, large and huge warehouses, industrial engineering and equipment
Petrochemical industrial projects, monitoring the progress of factory work, quality of oil production laboratories and equipment, supervising oil refining in the Kingdom of Saudi Arabia, a picture of two Saudi Gulf Arab engineers wearing a protective jacket and helmet at the work site
Saudi engineering professions and jobs, a picture from the back of two Saudi Gulf Arab engineers wearing helmets and protection vests walking in an oil refining plant, the concept of gas productivity in the Kingdom of Saudi Arabia, following up and monitoring the progress of work in factories
The concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at dawn, large and huge warehouses and tanks, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia
Saudi professions and jobs, quality of production and manufacturing, inspection of oil and gas equipment in the factory, achieving the industrial revolution, a close-up photo of a Saudi-Gulf Arab engineer wearing glasses, a protective helmet and a protective mask working in the field of engineering
The concept of petroleum engineering in the Gulf States, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, oil and gas refineries, fuel factories and mines in the Kingdom of Saudi Arabia, petrochemical industries and projects
Extracting underground resources from the sea, huge machines and heavy equipment used in petroleum exploration, work in the field of petroleum engineering, petrochemical industries and projects in the Kingdom, oil and gas refining factories in the industrial zone in Saudi Arabia, Saudi economic growth and progress
The concept of future development and prosperity of the region, reviewing the plans and developing strategies for the steps, a picture from the back of two Saudi Gulf Arab engineers wearing a protective jacket and helmet standing at a construction site in the Kingdom of Saudi Arabia during sunset, Saudi engineering professions and jobs
The concept of work in the industrial engineering sector, the quality of machinery and equipment in oil extraction plants, modern technologies in the production of oils and gas, oil refineries in the Kingdom of Saudi Arabia, a picture of a fuel plant from the inside, the development and progress in the technologies used in manufacturing processes
Pollution from petroleum production, petrochemical industries and projects, steel pipelines and cables, oil and gas refinery in industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Adopting modern technologies in gas production in Saudi Arabia, following up on the progress of work in factories, a close-up photo from the back of two Saudi Gulf Arab engineers wearing helmets and a protective vest and standing between pipelines at sunset, Saudi professions and jobs, background of the oil refining factory.
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