Softcover. Zustand: New. Softcover, 116 pages, 8.5 x 11 x .75 in., B&W diagrams and illustrations with text. Contents:> System Dynamics, Type E Couplers, Type EF Couplers, Type F Couplers, Uncoupling Levers, Yokes, Draft Gears, Cushioning Devices, Hydra-Cushion Center-of-Car, Slackless Drawbar, National Castings Articulated Connection, ASF Articulated Connectors, Spherical Articulated Coupling (SAC-1).