Direct acting indicating analogue electrical measuring instruments and their accessories - Part 5: Special requirements for phase meters, power factor meters and synchroscopes— 32 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories. Part 5: Special requirements for phase meters, power factor meters and synchroscopes— 19 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories. Part 5: Special requirements for phase meters, power factor meters and synchroscopes— 19 стр.
