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Recently, a new 1 billion ton oil field was discovered in Ordos. Last weekend, PetroChina Changqing Oilfield Company announced that it has passed the final review of the Ministry of natural resources

Friction materials play the role of transmission, braking, deceleration and parking in sports machinery and equipment. They are widely used in automobiles, trains, airplanes, mines, metallurgy, chemic

1. The new regulations for production license of friction sealing materials are officially implemented

friction coefficient

Friction coefficient is one of the most important performance indexes to evaluate any kind of friction material, which is related to the quality of the transmission and braking f