IS: 1885 (Part 37) - 1993/IEC 50 (691) - 1973; Electrotechnical vocabulary Part 37 tariffs for electricity

IS: 1885 (Part 37) - 1993/IEC 50 (691) - 1973; Electrotechnical vocabulary Part 37 tariffs for electricity - New Delhi BIS 1993 - 11p

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