| 摘要 |
FIELD: sport.SUBSTANCE: in the billiard ball containing a solid sphere-shaped body consisting of parts, having a cavity in which a mobile/stationary part is placed, the density of which material exceeds the density of the body material, the part has a shape of a biconvex lens mounted movably on a fixed axis. In the billiard ball containing a solid sphere-shaped body consisting of parts, having a cavity in which a mobile part is placed, the density of which material exceeds the density of the body material, the mobile part having a pear-like/spherical shape is enclosed in a flexible sheath. In the billiard ball containing a solid sphere-shaped body consisting of parts, having a cavity in which a stationary part is placed, the density of which material exceeds the density of the body material, two parts of spherical shape are fixedly mounted opposite each other. In the billiard ball containing a solid sphere-shaped body consisting of parts, having a cavity in which a stationary part is placed, the density of which material exceeds the density of the body material, the parts are fixedly mounted, having the shape of hemispheres. While playing billiard such balls are moved along a curved path with deviations in different directions, including the reverse movement.EFFECT: improvement of quality of the game.4 cl, 5 dwg |
