| 摘要 |
A manually-propellable wheeled vehicle, such as a baby stroller includes a pair of skids (12, 14) extending longitudinally of the frame (2) and pivotally mounted at their rear ends on an axis (16) extending tranversely of the frame, and releasably retained either: (a) in a retracted, non-operative position to permit the vehicle to be manually propelled along a supporting surface, or (b) in an extended, operative position wherein their front ends are lowered to engage the inner surface of a stair, curb, or other obstacle in the supporting suface, and thereby to permit the wheeled vehicle to be slid on the skids over the obstacle. |
