... message ok » 消息确定 drill size » 钻头尺寸 The incident caused events that nobody had expected. » 这一事件引起的事件，没有人预料到了。 ...
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指井径仪测量的井眼直径与钻头尺寸之差。
The difference in the caliper-measured diameter of the well and the bit size.
从而对钻pcb的钻头尺寸与质量的要求也越来越高。
Thus the size and quality of PCB drill is demanding increasingly.
优点：是可以根据使用要求定做钻头尺寸、类型，价格成本较低。
Advantages: bit size can be ordered according to your requirement, price cost is low.
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