North America Freight Railcar Parts Market Size, Share, Growth Analysis By Type (Covered Hopper, Box Car, Autocar, Center Beam, Coil Car, Flat Car, Gondola, Open to Hopper, Refrigerant Boxcar, Tank Cars, Others), By Component (Wheels, Axles and Bearings, Gears, Side Frames, Draft Systems, Others), By Distribution Channel (Aftermarket, OEM), By Region and Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Statistics, Trends and Forecast 2025-2034