The typical process of chemical measurement has been illustrated, and the general steps of the preparation of the CRMs have been reviewed in this paper.
本文对典型的化学测量过程进行了阐明，对有证参考物质的一般研制步骤进行了考察。
The source of uncertainty in the measurement for chemical content, the evaluation process of uncertainty were introduced, and some examples had been given as well.
介绍了测量化学成分时不确定度的来源和不确定度的评定过程，并举例说明。
The flow measurement accounts for a large share of many process measurements in the industry, such as thermal engineering, chemical engineering and metallurgy.
在热工、化工、冶金等诸多工业过程检测中，流量检测占有很高的份额，也是过程检测的一大难点。
The flow measurement accounts for a large share of many process measurements in the industry, such as thermal engineering, chemical engineering and metallurgy.
在热工、化工、冶金等诸多工业过程检测中，流量检测占有很高的份额，也是过程检测的一大难点。
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