Certified reference material of rigid PVC for oxygen index was developed.
研制硬质聚氯乙烯(硬质pvc)氧指数标准物质。
Characteristics, category and function of certified reference materials are introduced.
介绍了标准物质的特点、分类及作用。
The test and assessment for the homogeneity of a certified reference material are introduced.
介绍标准物质的均匀性检验及其评价方法。
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