Cast aluminium alloy enclosures for gas-filled high-voltage switchgear and controlgear; Amendment A2 to DIN VDE 0670-801 (VDE 0670 Teil 801):1987-04; German version EN 50052:1986/A2:1993
充气高压开关设备和控制设备用铸铝合金外壳;DIN VDE 0670-801(VDE 0670-801)修正案A2:1987-04;德文版EN 50052:1986/A2:1993