| 摘要 |
The invention relates to the field of sports training. The wall is inclined rearwards by 8 DEG for longer ball returns 1. A narrow channel inclined at 20 DEG 4, running along the net 1 and 2, contains the track of the passage of the satisfactory service balls 5, obtaining overhead balls with the same stroke. Wall equipped with figures in relief, integrated figures or attached figures F. Their inclined facets ensure impromptu-direction returns, similar to those of a player who is not officially graded. The figure equipment may be partial but installed symmetrically with respect to the median axis of the wall. Locations left free act as targets L, M, N, more particularly. The skill may be judged with the aid of a test game with the presence of optional niches F1 for accommodating the ball therein. On the ground, direction lines help to contain the game within the limits of the absent half-court. <IMAGE>
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