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 lansării
1944-04-08
Durată
16 min
Genuri
Documentar
Regizor
James E. Rogers

Distribuție

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