;Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring, reaming,Boring, and tapping.
点位系统适用于钻
、
、扩、铰、镗、攻丝等加工。
钻)扩[
，镗，镗阶梯]；
，埋头Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring, reaming,Boring, and tapping.
点位系统适用于钻、、扩、铰、镗、攻丝等加工。
A locking device and a reverse counterboring tool bar are designed, their structure and working principle are introduced.
设计了
种锁紧装置和
刀杆，介绍了其结构原理。
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