Eight testing methods for positioning accuracy of NC machine tools
The positioning accuracy of NC machine t…
Representation method of steel grade in China (XI): Silicon steel for electrical engineering
The steel grade consists of numbers, let…
Representation method of steel grade in China (X): Steel for welding
Welding steel includes carbon steel for …
Representation method of steel grade in China (VIII): Bearing Steel
Bearing steel is divided into four categ…
Knowledge of structural design of sheet metal parts (VIII): Allowable height of burr of punching parts
1. Allowable burr height of punching par…
Representation method of steel grade in China (VII): Plastic die steel
Except that the symbol "SM" is added at …