Ingots moves through rolling mill at the Ford River Rouge in Dearborn, Michigan. Rods in bloom mill. Hot pipe moves across a machine knocking sand core out of it. Steel bar heated in furnace and shaped by presses. Workers display forged ring gear, polished gear.
Automatic machinery in operation at the Ford River Rouge automobile factory in Dearborn, Michigan. View in auto manufacturing plant as large machine cuts teeth on gear. Worker's hand displays finished gear. Crankshaft worked upon by machine. Moving assembly line in background. Camshaft polished by machine as operating worker monitors the machine in the factory.
Workers assemble wire spokes to rim and hub at the Ford River Rouge in Dearborn, Michigan. Welding done by machine. Wheels on conveyor belt. Workers work on presses in a large room. Metal body parts stamped out. Long row of electric furnaces. Workers heat and shape steel
Documentary titled 'The Inside Story of Your Telephone'. Describes raw materials used in telephone manufacturing. Dynamite crew places dynamite at a copper mine in Montana, United States. Miners shovel the blasted ore onto ore cars. Ore is loaded into converters. Slag is poured off. Stacked bars of pure electrolytic copper. Picture of a telephone made of copper.
Describes raw materials used in telephone manufacturing. The map of India is shown. Women workers in America punch mica into strips and washers that insulates a telephone's transmitter. Animation shows the use of mica inside a telephone's transmitter.
Describes raw materials used in telephone manufacturing. Women pick cotton at a cotton farm in United States. Bales of cotton taken on hand carts. Animation shows the use of cotton thread inside a telephone's transmitter.
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