Automatic deceleration as coal loaded cars approach the inverted position and empty coal into a rotary dump in the U.S.
United States USA Date:1919 Duration:1 min 53 sec Sound:NO SOUND
Mining process of coal in the United States. Tons of coal is dumped at a rotary dump. A worker controls the operation of the dumping of the coal at a rotary dump. Automatic deceleration as a coal loaded car approaches the inverted position.
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