| 摘要 |
Jump ball comprising an inflatable flexible ball body (10,21) and a rigid annular plate, the ball body being jammed in the annular plate (2,25) in inflated condition and coupling between ball body (10,21) and annular plate (2,25) by means of interlocking and mutually confining male and female parts. The female part is preferably a groove (3,11,22) with the male part fitting into said groove (3,11,22). The groove (3,11,22) is preferably present in the ball body (10,21). |
