| 摘要 |
The ball game uses racquets to hit a ball via a net or similar into the opposite playing area. The balls consist of elastic soft foam of varying specific gravity and permit a tennis-like game at different speeds. The playing court is defined by two uprights with a net for height, and tapes to limit the length and width. The tapes are retained in the corners by weights. The balls may be hollow or solid; may have a heavy core; be round or oval; smooth or porous. Each ball has a diameter of 4-12 cm, and has roles, ribs, etc. |
