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reducing coupling /ˈɹɛd ˈswiːt ˈpɛpə/ n

中文：异径管接头

中文 · 异径管接头Español · reductor de calibreFrançais · raccord de réduction
Meaning：Fitting joining two pipes of different diameters in order to reduce the diameter of a pipe run.
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Pipe fittings 2

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