| 摘要 |
A structure with extensible/retractable panels (16, 17), which provides variable surface area for items such as headgear brims (15), furniture tops (212), etc., includes a first panel (210), a second panel (216) pivotally mounted to the first panel, and a third panel (217) pivotally mounted to the first panel. The second and third panels are rotatable from a retracted position in which the second and third panels are positioned underneath the first panel, and a deployed position in which the second and third panels extend beyond both the length and width of the first panel.
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