| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a training ball, more improving technique regardless of rules and practise, although the ball is generally made with materials and sizes according to the rules and practise for every sport and the ball is used in training as well as in a formal match. <P>SOLUTION: This ball is made a little smaller than the formal ball using the conventional material for every sport, and the surface thereof is coated with transparent or translucent suitable material to finish the ball to be equal in size to the formal ball or a little smaller than that. With the thus made ball, in the case of baseball, a batter sees the ball thrown by a pitcher to be smaller than the formal ball, so that he has to play while feeling more tense in order to make sure of the smaller ball and hit it as compared with feeling at the formal ball, Thus, when he always trains in such circumstances, he can be improved in his ability of selecting the ball and technique. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
