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branch return pipe /ˈbɹantʃ ɹɪtˈɜːn ˈpaɪp/ n

中文：回水支管

中文 · 回水支管Español · tubería descendenteFrançais · colonne descendante
Meaning：Pipe carrying the cooled water to the main return pipe one floor below.
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Forced hot water heating

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