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Automatic ball throwing device, directing device therefor and method of making an automatic ball throwing device
Automatic ball throwing device, directing device therefor and method of making an automatic ball throwing device
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机译:自动投球装置,其导向装置以及制造自动投球装置的方法
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摘要
The present inventions provides a method of modifying a pitching machine, including obtaining a pitching machine have a ball launching device and a support stand, removing the ball launching device from the support stand; attaching a directing device to the support stand, and attaching the ball launching device to the directing device. The present invention also provides methods of making an automatic ball throwing devices.
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