11714| 21
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鉆0.35的小孔鉆頭老是斷 |
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點(diǎn)評
銅的,,孔0.35mm,,孔深1mm
什么材料的,這個孔多深,。如果孔徑比不是很大的話,,可以試試,不過我說的這種鉆頭是磨刀機(jī)磨的
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點(diǎn)評
電火花太慢了,成本也太高了
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