Bureau of International Standards (ISI). Fasteners Power Grid Corporation of India Ltd. (PGCIL) Electricity Distribution Authority of Govt. of India. * National Thermal Corporation of India Ltd. (NTPC) Electricity Generation Authority of Govt. of India. * Department of Telecommunication (DOT) Telecommunication Authority of Govt. of India. * Central Organization of Railway Electrification (CORE) Railway Controlling Authority of India. * Electricity Dep't. of Various ...
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