Improving the quality of asphalt roads, advanced heavy machinery and equipment in factories, a close-up of an asphalt purification machine for repairing and paving public streets in the Kingdom of Saudi Arabia, a laboratory for measuring and calibrating asphalt in the city of Riyadh.
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![Improving the quality of asphalt roads, advanced heavy machinery and equipment in factories, a close-up of an asphalt purification machine for repairing and paving public streets in the Kingdom of Saudi Arabia, a laboratory for measuring and calibrating asphalt in the city of Riyadh.](https://cdn.arabsstock.com/uploads/videos/157952/thumbnail_JRwMZarC3Hhl5GgxW8qO.jpeg)