The ornamental design for a subwaytrainwagon, as shown and described.
1. Subway train wagon
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Side view
1.5 : Top
An industrial design for a subway train wagon that comprises a driver's cabin, a passenger compartment located on a frame mounted on bogies with wheel pairs, and a rear end part of the body with a transition vestibule.