| 摘要 |
This instrument comprises two sets of counters (6, 7), each game being attributed to one player. It also comprises two push-buttons (12) each actuating one of the said sets of counters. The mechanism of the instrument is designed as a function of the rules of the game of tennis, such that it suffices, each time a player scores a point, to actuate the corresponding control push-button, the instrument itself performing the necessary operations so that, taking into account the rules of the game of tennis, all the counters indicate the instantaneous situation of the game at any time. <IMAGE>
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