| 摘要 |
According to a first aspect of the present invention there is provided a tennis ball having a hollow resilient core to which a needlefelt covering is adhered. The needlefelt comprises an entanglement of fibers produced by needling a fiber batt in a range of angles including a plurality of angles which are non-perpendicular to the plane of the batt, and cutting or otherwise shaping the needlefelt to form a blank adapted at least partially to cover a ball. The needlefelt includes a scrim material therein.
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