| 摘要 |
Substantially rigid support structure for a piece of furniture, having a pair of transversely spaced struts in substantially fixed relationship to each other, the axes of the struts being inclined with respect to the horizontal, an integral rigid member having two upper ends spaced from each other and two lower ends spaced from each other and being oppositely inclined with respect to the horizontal and positioned intermediate the struts, and a plurality of tension members interconnecting the struts and the rigid member to form a substantially rigid structure.
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