NOTE 6 Traceability to national measurement standards does not necessarily require the use of the national metrology institute of the country in which the laboratory is located.

对国家测量标准的溯源性不要求必须使用实验室据国的国家计量院。

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However, a direct cause-and-effect isn't clear, said the team at the Charite Universitatsmedizin Berlin and of the Physikalisch-Technische Bundesanstalt (PTB), the German National Metrology Institute.

然而，并不能确定者之间有直接的因果联系，德国柏林夏洛蒂医科大学和德国标准计量机构-国立计量研究院的研究团队说。

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The sulfur dioxide calibration gases in nitrogen from Netherlands National Institute of Metrology was determined by the method, and an ideal degrees of equivalence was obtained.

用该法对荷兰国家计量院制备的氮中二氧化硫标准气体进行比对试验，取得了良好的等效性。

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