A large number of standard parts such as bolts are imported.

A large number of standard parts such as bolts are imported. It is not a problem in the Chinese standard parts manufacturing industry. It reflects that many high-end industries in China are still in the hands of the West. China does not have the right to speak. In comparison, domestic normal enterprises began to use domestic bolts for torque test verification at the beginning of assembly line layout, and it is basically impossible to test imported bolts.