three point bit three-wing bit的意思|示意
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三点钻头三翼钻头
three point bit three-wing bit的网络常见释义
三刃钻头 ... core bit wing 刮刀取心钻头的刀翼 three point bit three-wing bit 三刃钻头 wing bit 三刃钻头 ; 四翼刮刀钻头 ...