rock bit
短语词组
- rock -bit interaction model 岩石
- hydraulic rock -breaking bit 水力破岩钻头
- Screw Threads for Detachable Rock -Bit 活动凿岩钻头用螺纹
- tri -cone rock bit 三牙轮钻头
- roller -type rock bit 牙轮凿岩钻头
- nonself -cleaning rock bit [油气]非自洁式牙轮钻头
- full -hole rock bit 全断面无岩心钻头 返回 rock bit