三缘麻花钻
The field verification indicates that cutting life of straight stem twist drill treated with "LHH" tempering can be increased about 30% when compared with that by conventional three times tempering, and thus the energy and man-hour may be saved.
直柄麻花钻用DGG回火处理,其切削寿命比常规三次回火的约提高30%,且可以降低能耗。
The Principle of Making Model for a Twist Drill with Three Cutting Edge
三刃麻花钻造型原理
The twist drill may be divided into three principal parts: shank, body and point.
这个钻头可分为三个主要组成部分: 胫 、 身体和观点.
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