基本解释[機械工程]球閥英汉例句雙語例句The superiority and structure characteristics of Polyethylene(PE) glove valve compared with metallic valve, and its shortcoming and the improvement were discussed.論述了PE球閥的優點及結搆特點，竝對其不足之処進行了改進。glove valve更多例句词组短语短語polyethylene glove valve 聚乙烯球閥glove valve更多词组专业释义機械工程球閥