英语词汇“density grades”的翻译、意思、用法、释义-英汉汉英双解词典-爱贷网

词汇	density grades
释义	density grades 基本例句密度级 The UV photooxidation characteristics of different density macerals of Shenfu coal have been studied in a fixed bed photoreactor.摘要在固定床光氧化反应器中，对神府煤不同密度级组分进行了紫外光光氧化研究。
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