套管頭天然氣天然瓦斯油井氣gas: GAS = gasoline. casinghead: 套管頭casinghead bowl: 套管頭內(nèi)卡瓦座casinghead ool: 套管頭四通casinghead pressure: 套管頭壓力下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯