whirl wind cutting thread
... 套丝攻丝thread tapping 旋风切削螺纹whirl wind cutting thread 少无切削加工non-chip finish ...
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thread chaing 攻丝 thread tapping 旋风切削螺纹 whirl wind cutting thread 少无切削加工 non-chip finish 挤压光加工 extrusion finishing 精密加工 precision work 超精加工 s...
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