Degrees of protection of enclosures of switchgear and controlgear for voltages upto and including 1000v a.c. and 12000v a.c.

Degrees of protection of enclosures of switchgear and controlgear for voltages upto and including 1000v a.c. and 12000v a.c. - - London BSI 1977 - 12 p. - BSI 5420 : 1977 .







DBSI 5420 : 1977

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