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density metrology
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density metrology
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密度计量
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density metrology
密度计量
对密度这一物理量所开展的计量活动。密度是表征物质内在特性的一个物理量,表示单位体积中所含有物质的质量,国际单位制中的单位为千克/米3。
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更新时间:2026/3/19 0:05:18