| 摘要 |
A frame extension having a body with an interior body face, a proximal body face substantially orthogonal to the interior body face, and an attachment channel for receiving a clip is disclosed. A joint is attached to the body and a flange is attached to the joint. The flange has an interior flange face and an exterior flange face substantially parallel to and offset from the interior flange face. The flange is movable from an extended position where the interior flange face and exterior flange face are substantially parallel to the interior body face to a folded position where one of the interior flange face and exterior flange face is substantially abutted to the body.
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