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词汇 upgrading
释义 upgradingupgrading[ˈʌpɡreidiŋ]n.1.浓缩2.加强, 加固3.提高质量4.精选5.改造; 改进upgrading of knowledge知识的更新
特殊用法crude oil upgrading1.原油预处理cryogenic upgrading1.深冷提纯gasoline upgrading1.汽油提(高)质(量); 汽油改质hexane upgrading1.己烷提级; 己烷改性octane upgrading1.辛烷值提级upgrading of boiler weld1.锅炉焊缝加强
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更新时间:2025/3/14 17:47:10