| 摘要 |
A bowling practice device (1) is described comprising a a pair of inner rail members (2,3) and a pair of outer side wall safety members (7,8). The rail members (2,3) and the side wall members (7,8) are all interchangeable with each other. A plurality of cross members (12,13,14) are provided for supporting the rail members (2,3) and side wall members (7,8) in a relatively rigid spaced relationship. In use, a rolling bowling ball is received by the forward edge (4) of the rail members (2,3) and is caused to travel along a curved surface (6) extending rearwardly and upwardly from the forward surface (4) until the ball stops. When the ball stops, it is caused to return to the bowler. The side wall members (7,8) deflect a rolling ball rolled thereagainst toward the rail members.
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