酸值测定通常采用国家标准方法进行。
方法按照国家标准方法检测了7类市售净水器对细菌的去除功能。
Methods the bacterial removal effectiveness of 7 types of commercially available water purifiers was tested using the National Standard Methods.
介绍了煤中水分、挥发分连续测定的方法，并与国家标准方法测定结果进行比较。
This article introduces a way to determinate the inherent moisture and volatile matter in coal continuously. It is simple and saves time, and possesses good repeatability and accuracy.
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