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
System of standards for occupational safety. Personal eye and face protection equipment during welding and related processes. Automatic welding filters. General specifications
State system for ensuring the uniformity of measurements. Measurement microphones. Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
