Workers add value to raw materials - Vídeo de stock HD

/ rows of workers crossing the screen / miners digging in the mine / rail workers and boat workers transport materials to steel mill / finished steel leaves factory by train / farmer growing cotton / cotton processed in cotton gin / cotton driven to car factory / sheep prancing along is caught by a sheep shearer and stripped of its wool / naked sheep leaps away. Workers add value to raw materials on January 01, 1949 (Footage by Getty Images)