The tool design,working methods and process fundamentals of the trepanning processing were introduced.It proved that trepanning processing is a more cost-effective and accurate method.
从孔刀具设计、加工方法以及孔工艺基本要求几个方面说明,孔是一种更、有效并且精确深孔加工方法。
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Skilled barber-surgeons might even try something called trepanning to treat seizures and mental illnesses.
熟练的理发外科至可尝试做“头部穿孔”的方法来治疗癫痫和精神疾病。
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