000 00248nam a2200085 4500
080 _a
_b
245 _aIEC: 60079-1; Ed.4-2001: Electrical apparatus for explosive gas atmospheres, part 1:Flameproof enclosures "d"
100 _aI.E.C.
250 _a4th
260 _aGeneva
_bIEC
_c2001
300 _a53
999 _c37318
_d37318