| 摘要 |
A leg interconnection unit (4d) is connected between horizontal pair of legs (4a,4a'). The leg pair is provided in a U-shaped boat wagon (2). The interconnection unit is connected to the leg pair in such a way that horizontal distance between the pair of legs are adjusted by lengthening or shortening the distance between the leg pair. An Independent claim is also included for a leg adjustment structure. |
