| 摘要 |
This billiards set is provided with a group (1) of balls of a first color comprising a combination of five balls (1a-1e) having a predetermined color and numbered from 1 to 5, a group (2) of balls of a second color comprising a combination of five balls (2a-2e) having a color different from the first color and numbered from 1 to 5, and a group (3) of balls of a third color comprising a combination of five balls (3a-3e) having a color, which is different from those of the balls in the first and second groups, and numbered from 1 to 5. The fifth balls (1e, 2e, 3e) in these groups are provided additionally with special visibility zones (X, Y).
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