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.
Knurling is the process of producing a roughened surface by means of a specialized forming tool called a knurl.
是一种专门成形刀具叫滚花轮,将表面制成粗糙表面。
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