英语词汇“certified reference coal, reference coal sample”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	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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