IEC: 51 - 3 - 1984 (Amendment no.1 - 1994); Direct acting indicating analogue electrical measuring instruments and their accessories Part 3 special requirements for wattmeters and varmeters

IEC: 51 - 3 - 1984 (Amendment no.1 - 1994); Direct acting indicating analogue electrical measuring instruments and their accessories Part 3 special requirements for wattmeters and varmeters - Geneva IEC 1994 - 3p

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