The synchronizer is a component of the manual gearbox. Its function is to force the driving gear and the driven gear to have the same speed when the transmission is shifting
In the metal cutting process, cutting force is an important physical quantity, and surface roughness is one of the important indicators to measure the quality of processing.
The design of the cylinder head is the key to reducing fuel emissions and meeting stringent government regulations. The valve seat hole of the valve guide on the cylinder head part is a key hole