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求教,钻头断孔里了怎么取? |
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点评
高温回火后,钻头便阳 ,萎不硬变软了,很简单,再用钻头钻就可以了
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点评
谁叫你买火花机了,外面到处都有,拿出去叫别人搞。我们经常断合金钻头的,1米深的孔断了都能敲出来。
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点评
如果是深孔也白搭,
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