State system for ensuring the uniformity of measurements. State verification schedule for instruments measuring the ratio error and phase displacement of a.c. power frequency voltage in the range from 0,1/V3 to 750/V3 kV
Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery. Safety. Part 2-3. Particular requirements for hand-held grinders, disc-type polishers and disc-type sanders
