Nomatter transporting gas or oil, there are pipelines, there are pipe fittings such as bend pipe, reducing joint, T-pipe, pipe cap and so on.

无论是用管道输气、输油，凡有管道的地方，都少不了弯头、异径接头、三通、管帽等管件。

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The results have some guidance for the design and manufacture of T-pipe.

研究结果对三通的设计与制造有一定的指导作用。

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Mr. Bolcik wrote his friend and told him he was going to block him from the page if he didn't pipe down.

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