Invention Grant
US6110074A Foldable mini-trampoline 失效
可折叠迷你蹦床

Foldable mini-trampoline
Abstract:
The invention is a mini trampoline on which the frame is made in several parts in order to be easily carried and assembled. The mat is linked to the frame by means of springs and grommets. U shaped covers maintain the frame on one plane level. The tension of the springs is obtained by increasing the size of the frame.
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