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.
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.
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.
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