Occupational safety standards system. Respiratory protective devices. Methods of test and test equipment. Part 4. Determination of gas capacity, internal migration/desorption of gas and combined filters using constant air flow and breakthrough time of filters against carbon monoxide using sinusoidal air flow
Determination of regulated substances in electrotechnical products. Part 7-1. Hexavalent chromium. Presence of hexavalent chromium Cr(VI) in protective coatings on metals by the colorimetric method
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