| 摘要 |
A portable, collapsible practice device which forms an enclosure for containing balls which are pitched, hit, kicked or batted into the enclosure is described. The device is attached to and supported by a permanent backstop or other structure at the practice area. The device comprises a pair of frame members comprising pivotally connected support, netting or other foldable material which is suspended from and between the supports thereby forming the enclosure, means for attaching one end of the supports to the permanent structure and wires or ropes for maintaining the rigidity of the device.
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