bit drag
短語詞組
- drag bit [地質(zhì)]刮刀鉆頭;翼狀鉆頭;刮刀鉆頭
- step type drag bit 階梯形刮刀鉆頭
- stepped drag bit 階梯刮刀鉆頭
- drag bit drilling 刮刀鉆進
- blade drag bit 刮刀鉆頭
- fourway drag bit 四翼刮刀鉆頭
- way drag bit 四翼刮刀鉆頭
- stetype drag bit 階梯形刮刀鉆頭
- three -winged drag bit 三翼刮刀鉆頭;三翼鉆頭 返回 bit drag