| 摘要 |
A ball game has a rectangular net disposed in a vertical plane above the centerline of a playing area between opposite serving area ends of game court. The net has a rectangular central opening, running five-sixths the length and one-fifth the width of the net. A ball of diameter larger than one-third the width of the net opening is directed back and forth selectively either over or through the net between opponent players using apertured rackets.
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