000 00254nam a2200073 4500
080 _a
_b
245 _aIEC: 50(441)-1974 : International Electrotechincal vocabulary Chapter441 switchgear and controlgear
700 _aInternational Electrotechnical Commission
260 _bIEC, Geneva, 1974
300 _a53p
999 _c26469
_d26469