IS:4691 degree of protection provided by enclosures for retaing electrical machinery
Indian Standard Institute
IS:4691 degree of protection provided by enclosures for retaing electrical machinery - ISI 1968 - 21
621.313 / ISI
IS:4691 degree of protection provided by enclosures for retaing electrical machinery - ISI 1968 - 21
621.313 / ISI