rock bit
短語詞組
- rock -bit interaction model 巖石
- hydraulic rock -breaking bit 水力破巖鉆頭
- Screw Threads for Detachable Rock -Bit 活動鑿巖鉆頭用螺紋
- tri -cone rock bit 三牙輪鉆頭
- roller -type rock bit 牙輪鑿巖鉆頭
- nonself -cleaning rock bit [油氣]非自潔式牙輪鉆頭
- full -hole rock bit 全斷面無巖心鉆頭 返回 rock bit