IS: 2032 (Part VII) - 1965 (with amendment no.1 - 1966) : Graphical Symbols Used in Electrotechnology Part 7 Switchgear and Auxiliaries

IS: 2032 (Part VII) - 1965 (with amendment no.1 - 1966) : Graphical Symbols Used in Electrotechnology Part 7 Switchgear and Auxiliaries - New Delhi BIS 1966 - 9+1p

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