短語(yǔ)詞組短語(yǔ)closed feed system 封密給水系統(tǒng);閉式給水系統(tǒng)closed -system trap 封閉型圈閉closed pipeline system 閉式管道輸送系統(tǒng)closed ullage system 閉式液位測(cè)量裝置closed center system 中位關(guān)閉系統(tǒng)closed class system 封閉式階級(jí)制closed pipe system 封閉管道系統(tǒng)closed fireroom system [機(jī)]閉式火室系統(tǒng)closed hydraulic system 閉式液壓系統(tǒng) 返回 closed system