hat there is a demand for these wheels isshown by the fact that more than 150,000 are nowin use, 55,000 of them in service under 100,000 lbs.capacity cars, and the number is steadily increasing. It is difficult to make an estimate of the mileagecost of freight car wheels because of the… … 3;3-lN. STEEL WHEEL. ■J4^0M.
Railroad cars
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