IS: 1885 (part 57) - 1993/IEC Pub. 0050 (131) - 1978; Electrotechnical vocabulary Part 57 electric and magnetic circuits
IS: 1885 (part 57) - 1993/IEC Pub. 0050 (131) - 1978; Electrotechnical vocabulary Part 57 electric and magnetic circuits
- New Delhi BIS 1993
- 11p
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