短語詞組短語submarine groove pipeline 海底溝槽內(nèi)管道submarine steel pipeline 海底管線管submarine gas pipeline 海底煤氣管submarine suspended pipeline 海底懸空管道submarine sewage pipeline 海底污水管道Submarine Oil Pipeline 海底輸油軟管;海底輸油管道hanging submarine pipeline 海底懸空管道submarine oil petroleum pipeline 海底輸油管aerial submarine pipeline 海底懸空管道 返回 submarine pipeline