thumb screw是什么意思

网络释义

1)thumb screw,指旋螺纹2)Spiral Mark,螺旋线纹3)corkscrewweave,螺旋斜纹4)Thread spinning,旋压螺纹5)right-hand flight,right-hand thread,右螺旋纹6)LHT,左旋螺纹

Removing of Spiral Mark on Workpiece Resulted from Cylindrical Grinding;

外圆磨床磨削中工件螺旋线纹缺陷的排除