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400-2...the material to the lower bins, where it is dropped into trucks and hauled to the railroad 16 miles away, loaded into box- cars and sent to the roofing manufactur- ers. A 100-horsepower

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Page 1: 400-2...the material to the lower bins, where it is dropped into trucks and hauled to the railroad 16 miles away, loaded into box- cars and sent to the roofing manufactur- ers. A 100-horsepower