英语词汇“hard vacuum”的翻译、意思、用法、释义-英汉汉英词典

单词	hard vacuum
释义	hard vacuum高真空hard vacuum高真空電機工程hard vacuum高真空地球科學名詞—太空hard vacuum高真空航空太空名詞hard vacuum高真空機械工程hard vacuum高真空電力工程
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