gas pipelinen. 天然气管线,煤气管线;气体管道
oil pipeline油管;输油管
1.The company's products include pipelines and risers used in underwater oil-field operations.
该公司的产品包括油田水下作业所用的管道和立管。
3.The problem is that it still has to be transported by trucks or rail because they haven't built any pipelines to move it.
问题是,它仍然需要通过卡车或铁路运输,因为他们没有建造任何管道来运输它。