IEC: 517 - 1990 (Amendment No.1 - 1994); Gas-insulated metal-enclosed switchgear for rated voltages of 72,5kV and above
IEC: 517 - 1990 (Amendment No.1 - 1994); Gas-insulated metal-enclosed switchgear for rated voltages of 72,5kV and above
- Geneva IEC 1994
- 7p
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