Power Lines

Giới thiệu tóm tắt

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.

Thể loại: Phim Tài Liệu

Diễn viên: Norman Shelley, Alvar Liddell

Phi hành đoàn: James E. Rogers (Director)

Quốc gia: United Kingdom

Thời gian chạy: 16 phút

Chất lượng: HD

Giải phóng: 1944

imdb rating 7

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