| 摘要 |
The present invention relates to collapsible self-supported structures. All of these structures have one or more of the following characteristics: adjustable length and/or, width and/or height, lightweight, easily collapsed, very compact when collapsed and easily carried, stored and transported. All of the collapsibe structures contain one or more of the following elements: anti-torque posts, crossed support arms, telescoping crossed support arms, detachable horizontal support bars telescoping horizontal support bars, Structure Locking Elements, Anti-Collapse Locking Elements and Anti-Tipping Assemblies
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