[油氣] 鉆桿單向閥 check valve to booster pipe: 止回閥至助力器管check valve to manifold pipe: 止回閥至歧管的check-valve to manifold pipe: 止回閥至歧管管control valve to check valve pipe: 控制閥至止回閥管drilling pipe: 鉆桿; 鉆井管材下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯