A steel drill being hammered repeatedly during its processing at a factory in the United States.
United States USA Date:1921 Duration:2 min 1 sec Sound:NO SOUND
The various types of drills and bits used for drilling into rocks in the United States. Men work on a drill steel heating furnace and sharpener as they prepare the drill steel by repeated hammer blows. The drill steel being hammered repeatedly. A man inserts a sharpener into the steel as they prepare it for auger drill.
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