英语词汇“certified reference coal, reference coal sample”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典-复社网

单词	certified reference coal, reference coal sample
释义	certified reference coal, reference coal sample 标准煤样; 具有高度均匀性、良好稳定性和准确量值的煤样，主要用于校正测定仪器，评价分析试验方法和确定煤的特性量值。
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