短语词组短語oil drilling -rig electric drive system 石油鑽機電傳動系統oil -drilling rig mechanic 石油鑽探鑽機技工的oil consumption per rig -month 每鑽機台月耗機油量;每鑽機月消耗機油Oil -film bearing test rig 油膜軸承實騐台 返回 oil-rig