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

直纹滚花螺母采用冷形新工艺 ,效显著。

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

摘 要： 直纹滚花螺母采用冷形新工艺，效显著。