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.

上映日期
1944-04-08
片长（分钟）
16分钟
类型
纪录
导演
James E. Rogers

演员阵容

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