Invention Application
US20090144897A1 FRAME MEMBER AND ATTACHED MEMBRANES 有权
框架成员和连接膜

FRAME MEMBER AND ATTACHED MEMBRANES
Abstract:
A collapsible apparatus includes a frame member being formed from a flexible twistable material, a first membrane and a second membrane, and an inflatable bladder. The second membrane is removably attachable to the first membrane.
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