railroad truck

 

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Railroad truck

Wikipedia

 

railroad truck (plural railroad trucks)

1. (US) A chassis or framework-like structure underneath a railroad car to which wheel axles (and, hence, wheels) are attached through bearings. (Not to be confused with railway truck or railtruck, which are British English synonyms of railroad car)

   Synonyms: wheel truck, truck, (British English) bogie

• leading truck
• trailing truck