Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring, reaming,Boring, and tapping.

点位系于钻孔、孔、扩孔、铰孔、镗孔、攻丝孔加工。

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孔刀杆，介绍了其结构原理。