英语词汇“twin-seat valve with one unidirectional seat and one bidirectional seat”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	twin-seat valve with one unidirectional seat and one bidirectional seat
释义	twin-seat valve with one unidirectional seat and one bidirectional seat 一单向座一双向座的双座阀
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