| 摘要 |
A test device for a foldable object is provided. The device comprises a frame, an external balloon and an internal balloon. The external balloon is disposed on the frame, and the internal balloon is disposed on an inner surface of the foldable object. When the internal balloon expands, it provides a first thrust to unfold the foldable object, and when the external balloon expands, it provides a second thrust to fold the foldable object. A folding test on a foldable object is performed accordingly.
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