| 摘要 |
A carrying case is provided having first and second facing sections rotatably opened and closed, a normally collapsed exercise unit within the first section including a pair of pneumatic cylinders coupled to a pair of pressure actuated steps, a handle to extend the exercise unit for use whereby one is able to alternately lower and raise the steps by exerting a downward force on them, and further incorporating means for fastening the exercise unit, once extended, to the other facing section to secure it in position when being used.
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