... long-hole type blasting 深孔爆破 long-hole boring apparatus 钻深孔装置 long-hole percu ive machine 冲击式深孔钻机 ...
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并分析了超声振动钻削装置设计中的一些关键技术问题，为在摇臂钻床上加工小直径深孔提供了一种新的工艺方法。
Some key techniques were analyzed when designed vibration device, and a new method was put forward for small-diameter deep holes.
并分析了超声振动钻削装置设计中的一些关键技术问题，为在摇臂钻床上加工小直径深孔提供了一种新的工艺途径。
Some key techniques were analyzed when designed vibration device, and a new method was afforded for small-diameter deep holes.
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