| 摘要 |
<p>The device is hidden in a wood box (1)of the same wood as the one of the roulette, and from which a marbles flinging metal pipe (4) projects, suitably curved and directed below the kerb of the rotating disc so as not to hinder the whirling motion of the marbles on said disc, connected to an electrovalve (2) and, on the opposite side, a rubber pipe (3b) in turn connected to said electrovalve and to a small compressor (5) or compressed air bottle, conveniently hidden under the game table.</p> |
