Is: 1885 (Part L) - 1978; Electrotechnical Vocabulary Part 50 Telecontrol
Indian Standards Institution
Is: 1885 (Part L) - 1978; Electrotechnical Vocabulary Part 50 Telecontrol - BIS 1979
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Is: 1885 (Part L) - 1978; Electrotechnical Vocabulary Part 50 Telecontrol - BIS 1979
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