A folding umbrella的用法和样例：
- The fastening or opening covered by such a fold.
- This is a box camera and that is a folding one.
- If you're going camping you'll need a folding bed.
- Speechless, Henry nodded and sat on a folding seat.
- This is a box camera and that's a folding one.
- A folding bag is a good companion in shopping.