00894nam0-22002891i-450-99000048717040332120070914125254.0000048717FED01000048717(Aleph)000048717FED0100004871720020821d1973----km-y0itay50------bafreengy-------001yyLampes a vampes de sodium a basse pression= Low pressure sodium vapour lampsCommission electrotechnique internationaleGeneve, SuisseBureau central de la CEI197320 p.30 cmPublication CEI192Illuminazione a vapori di sodio621.327'6International Electrotechnical CommissionITUNINARICAUNIMARCBK99000048717040332110 D IV 189760DINELDINELUNINA