体育彩票超级大乐透201走势图

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    来看看标准物质的特点及定义分别是什么

    发布时间: 2019-09-03  点击次数: 59次
       标准物质(RM)reference material(RM):是一种已经确定了具有一个或多个足够均匀的特性值的物质或材料,作为分析测量行业中的"量具",在校准测量仪器和装置、评价测量分析方法、测量物质或材料特性值和考核分析人员的操作技术水平,以及在生产过程中产品的质量控制等领域起着不可或缺的作用。

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      (2)JUNYUNXING

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      (3)WENDINGXING

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