bit drag
短语词组
- drag bit [地质]刮刀钻头;翼状钻头;刮刀钻头
- step type drag bit 阶梯形刮刀钻头
- stepped drag bit 阶梯刮刀钻头
- drag bit drilling 刮刀钻进
- blade drag bit 刮刀钻头
- fourway drag bit 四翼刮刀钻头
- way drag bit 四翼刮刀钻头
- stetype drag bit 阶梯形刮刀钻头
- three -winged drag bit 三翼刮刀钻头;三翼钻头 返回 bit drag