11630| 21
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鉆0.35的小孔鉆頭老是斷 |
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點(diǎn)評(píng)
銅的,孔0.35mm,,孔深1mm
什么材料的,,這個(gè)孔多深。如果孔徑比不是很大的話,,可以試試,,不過(guò)我說(shuō)的這種鉆頭是磨刀機(jī)磨的
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點(diǎn)評(píng)
電火花太慢了,,成本也太高了
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