词
缘;
闩;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
反锪孔刀杆，介绍了其结构原理。
counterbore
/'kauntə,bɔ:/
n. (用平底扩孔钻)扩孔[锪孔，镗孔，镗阶梯孔]；沉孔，埋头孔
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相似单词
counterbalancing, counterbattery, counter-bid, counterblast, counterblow, counterbore, counterboring, counterboy, counterbrace, counterbracing,