knurl

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.

both lateral and medial nasal vestibule have a knurl.

鼻孔后方内、外侧均有隆起；

The result indicate that there are no bud seat and cicatricle, or the knurl is not obvious.

分析结果表明，核桃生长期方块芽接时砧木和接穗的量化指标为：①接穗芽座无，叶痕无或有隆起但不明显；

The Design and Calculation of Annular Knurl High-strength Self-hold Screw

滚花式高强度自锁螺栓的设计与计算

Cold Extrusion Die for Straight Knurl Nut in a Single Process

直纹滚花螺母冷挤压一次成形模具

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。