| 摘要 |
A roller skate has a front lever and a rear lever mounted on a base plate, as well as pairs of hemispherical rollers, each pair of rollers being supported by axles which are held by each of the levers and which are tilted toward the skating surface. Each lever is supported by a base plate by means of a horizontal shaft directed at right angles to the running direction of the roller skate in such a manner that the lever is allowed to turn about the axis of the shaft thereby to absorb shocks transmitted from the rollers.
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