screw pipe union
... straight pipe union 直接接头 screw pipe union 螺纹管节 blower pipe union 吹风管连管节 ...
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螺纹法兰联管节 screw flange coupling
内螺纹联管节 female union
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连接两节管子(生产油管、套管或衬管等)所用的带螺纹的连接件。
A threaded coupling used to join two lengths of pipe such as production tubing, casing or liner.
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