State system for ensuring the uniformity of measurements. Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Part 7. Optical plumbing instruments
Carbonaceous materials for use in the production of aluminium. Green and calcined coke. Determination of trace elements by flame atomic absorption spectroscopy
In vitro diagnostic medical devices. Measurement of quantities in samples of biological origin. Requirements for certified reference materials and the content of supporting documentation
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