Power Lines (1944)

The manufacture of cables for transmitting electric power is shown. Copper bars are rolled and drawn into wire, which is twisted into strands, and covered for insulation and protection with layers of rubber, lead, cloth and paper. The completed cables are then given high-voltage tests before being dispatched from the factory.

Data de estreia
1944-04-08
Duração
16 min
Géneros
Documentário
Realizador
James E. Rogers

Elenco

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