Interstate system for ensuring the uniformity of measurements. Weight amounts of the standard materials for preparation of the buffer solutions - operational pH standards of 2-nd and 3-rd classes. The technical and the metrological characteristics. Methods of them
Carbonaceous materials for use in the production of aluminium. Green and calcined coke. Determination of trace elements by flame atomic absorption spectroscopy
Medical electrical equipment. Part 2. Particular requirements for the safety, including essential performance, of ambulatory electrocardiographic systems
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