| 摘要 |
Disclosed is a training device comprising a support structure mounted for travel along a game surface, the support structure having a pair of opposed upright portions and a transverse member, the transverse member extending b etween and being positionable at one of a plurality of operative elevations relative to the opposed upright portions, a selected operative elevation cor responding to an elevation for a trainee to grip the transverse member and e xert sufficient lateral force thereto to advance the support structure along the game surface.
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