NF C64-471-204*NF EN 62271-204:2012 High-voltage switchgear and controlgear - Part 204 : rigid gas-insulated transmission lines for rated voltage above 52 kV
2012NF C64-471-204*NF EN 62271-204:2012 High-voltage switchgear and controlgear - Part 204 : rigid gas-insulated transmission lines for rated voltage above 52 kV