pipelinen.管道；管线；渠道v.用管道运输pipeline seepage管道渗漏pipeline hanging管线悬空pipeline company[经] 管道公司pipeline setting管线放线pipeline project拟议中项目pipelines robots排水管道机器人pipeline erosion管道冲蚀pipeline monitor管道监测pipeline scraper清管刮刀Pipeline Syntony管路共振