| 摘要 |
PURPOSE: A log-rolling game device is provided, which enables users to enjoy log-rolling game in a place without water. CONSTITUTION: A log-rolling game device comprises: a log or a cylindrical object which is similar to the log; and a tachometer capable of measuring the speed of rotation of the cylindrical object. When one team rolls the cylindrical object by the feet, maximum rotation velocity obtained before a player loses balance is recorded as the result of the team.
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