Direct acting indicating analogue electrical measuring instruments and their accessories. Part 5. Special requirements for phase meters, power factor meters and synchroscopes
State system for ensuring the uniformity of measurements. State special standard and all-union verification schedule for means measuring temperature coefficient of linear expansion in the range 4,2-90 K
Waterproofed and biocide impregnated linen and half-linen fabrics. Standard requirements for amount of fastened compounds and indices of aqueous extract
