| 摘要 |
An apparatus for carrying out a motor activity for playing or sporting purposes, comprising a cylindrical structure (1) housing therein a footboard (2), which is characterized in that said footboard (2) is of cylindrical shape and is revolvingly mounted internally to said structure (1), the arrangement being such that a user in order to carry out the motor activity places him/herself on said footboard (2) and internally to said cylindrical structure (1).
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