N-COUNT
（常指埋于地下的石油或燃气）管道，管线
A pipeline is a large pipe which is used for carrying oil or gas over a long distance, often underground.
例句
A consortium plans to build a natural-gas pipeline from Russia to supply eastern Germany.
一家财团计划建造一条从俄罗斯向德国东部输送天然气的管道。