State system for insuring the uniformity of measurements. Secondary standards of units of mass and volumetric flow rate, mass and volume fluid. General metrological and technical requirements
Welding personnel. Approval testing of welding operators for fusion welding and of resistance weld setters for fully mechanized and automatic welding of metallic materials
Electrical apparatus for use in the presence of combustible dust. Part 2. Test methods. Section 1. Methods for determining the minimum ignition temperatures of dust
