挤压成形

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

滚花螺母采用挤压一次成形 ,成效显著。

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

摘 ： 滚花螺母采用挤压一次成形，成效显著。