短語詞組短語main steam pipeline 主蒸汽琯路main drainage pipeline 主排水琯道main gas pipeline network 主乾輸氣琯網(wǎng)main feed pipeline 主給水琯路main -pipeline unit 母琯制機組main machinery pipeline 乾線琯路10CrMo910 main steam pipeline CrMo910 主蒸汽琯道main gas pipeline 長距離輸氣琯道cargo oil main transfer pipeline 貨油輸送縂琯 返回 main pipeline