| 摘要 |
A new Bowler's Training Device for helping a bowler roll higher scores. The inventive device includes a housing disposed above the surface of the lane, a first adjustable light emitting device in the housing emitting a light beam onto the lane providing a ball lay down indicating point, and a second adjustable light emitting device in the housing emitting a light beam onto the lane providing an indicating line indicating the bowling ball travel path.
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