| 摘要 |
<p>PCT No. PCT/EP93/02707 Sec. 371 Date Mar. 31, 1995 Sec. 102(e) Date Mar. 31, 1995 PCT Filed Oct. 4, 1993 PCT Pub. No. WO94/07577 PCT Pub. Date Apr. 14, 1994A tennis practice device comprises a housing made of two oval elements. The two elements are made of a material which permits to stop the ball at the moment of the impact because the material when it is coupled with the material which covers the ball causes the ball to adhere strongly to the tennis racket. The device may be used indoors and a teacher may train several students at the same time to determine the point of impact of the ball.</p> |
