北美新一代货车转向架

The New Generation of Freight Car Trucks in Northern American Railroads

着重介绍美国新一代货车转向架的研制及试验情况，并对旧型货车转向架的改进试验作了相应的介绍。

This paper emphatically introduces development and testing for the new generation of the American freight car trucks,and correspondingly improving and testing for the old ones.