State system for ensuring the uniformity of measurements. Ultrasonic power in liquids. General requirements to measuring methods in the frequency range 0,5 to 25 MHz
Electrical installations of buildings. Part 7. Requirements for special installations. Electrical installations of buildings and structures with electrical heating of floors and surfaces
State system for ensuring the uniformity of measurements. State verification schedule for means measuring the spectral radiance and relative spectral distribution of radiating power in the wavelength range from 0,3 to 25,0 µm
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