| 摘要 |
A roller ski comprised of a tube which is equipped at each end with a double fork (15) which supports the wheel (18) and is turnable up with a transverse axle (21). The double fork works together with a spring device inside of the tube in such a way that the double fork can be locked at the tube when it is located at the lowest height above ground. From this position the double fork can be swung down for obtaining the desired spring effect with the aid of the spring device.<IMAGE> |
