短語詞組短語bit -rock mutual action 鉆頭與巖石互作用bit and rock 鉆頭與巖石rock bit 巖石锧頭;巖石鉆頭;鑿巖鉆頭rock bit sharpening machines [機(jī)]礦井鉆頭刃磨床rock bit design 鉆頭研制rock bit cone 鉆頭牙輪tricone rock bit 三牙輪鉆頭;三維式巖石鉆頭;三牙輪巖石鉆頭 返回 bit rock