Oil drums, that is, oil drums, are usually made of iron or plastic and are cylindrical. They were first invented by the Germans on the eve of World War II. They are mainly used to carry important military materials-gasoline, which can be said to be a typical product of war.
Oil drums were invented by Germans. Before World War II, the German high command formulated the strategy of blitzkrieg, but at the same time, there was a problem. 1 barrel of international standard crude oil is about 0. 136 tons. 1 ton crude oil is 7.35 barrels, and 1 barrel is 136.9863 kg (kg) oil, which can be refined to produce gasoline and diesel oil.
30 liters for waste oil recovery, 50 liters for diesel oil, 30 liters for 100 kg plastic bucket, 30 liters for 60 kg plastic bucket and 25 liters for 70 kg plastic bucket.