knurl

1.There are lots of advantages by cold extrusion for straight knurl nut in a single process.

纹滚花用冷挤压一次形新工艺 ,著。

2.Abstract： There are lots of advantages by cold extrusion for straight knurl nut in a single process.

摘 要： 纹滚花用冷挤压一次形新工艺，著。