optical thread tool microscope 光学螺纹工具显微镜

thread tool gage 螺纹刀具规

single-point thread tool 单锋螺纹刀具

screw thread tool gauge 螺纹梳刀样板

square-thread tool 方螺纹车刀

thread tool gauge 螺纹车刀刃磨和安装样板

screw-thread tool gage 螺纹梳刀样板

screw thread tool gage 螺纹梳刀样板

worm-thread tool gauge 齿轮滚刀用样板