EN 50069-1991 充气高压开关和控制设备用锻铝和铸铝合金焊接复合外壳;合并勘误表2007年8月;包含修改件A1-1993年8月
Welded composite enclosures of cast and wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear (Incorporates Amendment A1: 1993; Incorporating Corrigendum August 2007)