“primary hardness standard machine”的概念、定义、翻译、参考文献-科学参考

单词	primary hardness standard machine
释义	primary hardness standard machine Encyclopedia 工学[标准仪器设备]释 primary hardness standard machine基准硬度机复现和保存硬度量值单位，用作统一国家硬度量值的最高依据的硬度机。
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