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单词 石油精
例句 DEFINITIVE EXAMPLES 权威例句〔hydroforming〕A process in which naphthas are converted to high-octane aromatics in the presence of hydrogen and a catalyst under pressure and heat.临氢重整:在高温高压下,在氢和催化剂的作用下石油精转化为高辛烷值的芳烃的过程美国传统
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