The meaning of the performance level of screws and bolts
The bolts for steel structure connection are classified into more than 10 grades of 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9…
The bolts for steel structure connection are classified into more than 10 grades of 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9…
Surface treatment is a process of forming a coating layer on the surface of a workpiece by a certain method. The purpose of the surface …
any people know what precision parts are processed, but for the machining process, there are still many people who are not …