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钻孔时,常因速度快使钻头断在工件中。可取两根比断钻头长30毫米的铁丝,沿断钻头的槽插入,然后,用钢丝钳将余在外面的
When drilling, often due to the speed of the drill broken in the workpiece. It is advisable to take two wires 30 mm longer than the broken drill bit and insert it along the groove of the broken drill bit and then use wire cutters to leave the remaining