... high specific activity 高比放射性 high speed bit 高速钻头 high speed tool steel 高速工具钢 ...
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高速牙轮钻头轴承的失效分析。
对微细高速钢麻花钻破坏断口进行了显微观察和测量，根据微小孔钻削实验结果，分析了造成钻头折断的原因和影响其使用寿命的因素。
The fault plane of micro-drill is measured with microscope. According to the result of test, the main elements of destroying drill is investigated.
虽然也有硬质合金刀尖的钻头，麻花钻一般用高速钢制成。
Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available.
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