| 摘要 |
A peak including a peak part and an elongated substantially rectangular retaining band both die cut from closed cell foamed plastic material. A pair of openings are formed respectively at the corners of the peak part. A pair of apertures are provided at each end of the retaining band. Dumbbell shaped connectors connect the band to the peak part. Each connector passes through one of each pair of apertures and a registering opening. By having two apertures at each end of the band, the length of the band can be adjusted.
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