Coal is the conventional energy with the largest reserves and the widest distribution in the world, and the vast majority of proven reserves are concentrated in Asia-Pacific, Europe, and North America. Among them, the United States has the largest coal reserves in the world, accounting for 23.20%, followed by Russia, accounting for 15.10%, Australia accounting for 14.00% of the world, and my country's proven coal reserves accounted for 13.30%, ranking fourth in the world.

With the massive exploitation of mine resources, floating oil seals are widely used. In addition to engineering machinery, construction machinery, and agricultural machinery, floating oil seals are often used as stable oil sealing products in mining machinery, mine cars, and coal shearers in recent years.