In cutting experiments, it can be observed and measured that the chip thickness, the tool wear, the screw thread teeth, and so on.
在切削实验中，可对切屑厚度、刀具磨损及螺纹等的形貌进行观察并测量其尺寸。
2
The process of screw spindle is the key of producing screw spindle pump, but the calculation of shaped cuttingtool is still the crux of process of screw spindle.