藍色塑膠桶 - 4K 影片檔

4K Full HD : - Large group of blue barrels in warehouse. The standard barrel of crude oil or other petroleum product. Plastic drums are manufactured through a process called blow molding. This process allows for various shapes to be created with no seams on the inside. Barrels are still molded in a cylindrical shape to allow for rolling and handling using the same tools as a steel drum.