New devices for improve returning a service skill of weak side in tennis

这项研究旨在为网球初学者开发一种训练设备。该装置的要点是：通过PC随机呈现多个服务场景，初学者根据呈现的服务过程尽可能快地进行充分的跳出，进而提高返回服务的技能，特别是弱侧的服务技能

The study aiming to develop a training device for a tennis beginner was executed. An outline of the device is that ; presenting many service scenes by PC at random, the beginner having adequate step out quickly as possible according to the presenting service course, and then improving returning a service skill, especially of weak side