| 摘要 |
A resilient three dimensional structure comprising a plurality of interlocked strips each having co-engaging projections and apertures. The projections of one strip engaging apertures of another strip to retain against relative movement perpendicular to the length of said one strip and the apertures of said one strip being engaged by projections in said other strip to retain the two strips against relative movement in a second direction perpendicular to the length of said one strip.
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