VDE-0257 - 1967; Specification for gas-filled cables in steel conduit and associated fittings for a.c. and d.c. installations up to 275kV rated voltages

VDE-0257 - 1967; Specification for gas-filled cables in steel conduit and associated fittings for a.c. and d.c. installations up to 275kV rated voltages - Frankfurt VDE 1967 - 21p

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