roller bit
短語詞組
- roller r bit 牙輪鉆頭
- roller bearing bit 滾柱軸承鉆頭
- roller cone bit 牙輪鉆頭
- roller cutter bit 牙輪鉆頭
- cross roller rock bit 十字形四牙輪鉆頭
- sealed roller bearing bit 密封滾動(dòng)軸承鉆頭
- roller core bit 取心牙輪鉆頭
- roller -bit hole rig 牙輪鉆機(jī) 返回 roller bit
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