| 摘要 |
PROBLEM TO BE SOLVED: To hold a soft darts match and a hard darts match in the same place. SOLUTION: Planes, to which a hard darts board 1 can be attached in the front side, are formed as hard darts board attaching members 22 and 23 to cover the front face of a soft darts board 2. The hard board attaching members 22 and 23 have a mark 25 on the planes indicating the same position as the center of the soft darts board 2. COPYRIGHT: (C)2009,JPO&INPIT
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