常見木工鑽頭你了解認識幾種呢 | 全台葬儀社評價

2016年7月25日—常見木工鑽頭你了解認識幾種呢...一般鑽削頭部分有三個尖，稱為三尖盲孔鑽，且在導向部分有螺旋槽。可以看做是螺旋鑽的導向部分+橫向鑽削頭（橫刃+沉割刀+ ...

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