... 大头锤 mallet 大小头承插管 reducing pipe joint 大楔角V带 wide-angle V-belt ...
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变径管节 reducing coupling; reducing pipe joint 变径管线 telescoped line ..
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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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