For some research purposes and possibly for referee work, analyzed primary standards may be obtained from the U. s. Bureau of standards.

对于某些研究工作和仲裁工作，可以从美国标准局获得经过分析的一级标准物。

youdao

For some research purposes and possibly for referee work, analyzed primary standards may be obtained from the U. s. Bureau of standards.

对于某些研究工作和仲裁工作，可以从美国标准局获得经过分析的一级标准物。

youdao