coal ratio

英美

释义
用例
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- 煤比(冶炼一吨铁所需煤炭量)
例句
临近单词

coalpit coal coal-controlled process coal accumulation pattern coalrock dynamic disaster Coal floor water bursting coal gasification furnace coal chemical engineering Coalbed methane reservoir coal fields of west Henan coal-fired boiler plant coal liquifaction reacter

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