直纹滚花螺母采用冷挤压一次成形新工艺，成效显著。

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

youdao

直纹滚花螺母采用冷挤压一次成形新工艺，成效显著。

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

youdao