Plastics pipes and fittings. Butt fusion jointing procedures for polyethylene (PE) pipes and fittings used in the construction of gas and water distribution systems
State system for ensuring the uniformity of measurements. State primary standard and all-union verification schedule for means measuring phase shift angle and field intensities ratio distribution in apertures of antenna system with operating dimension from 0,5x0,5 to 3x3 m2 at the frequency range from 8,2 to 12 GHz
