The skeleton adopts a folding umbrella type skeleton, which can be unfolded and folded freely.
所述的骨架结构是折 叠伞形骨架，可以随时撑开、收起。
The utility model adopts an umbrella type structure principle to plug by an outer body sealing way.
本实用新型采用了伞型结构原理，以外体封闭方式堵漏。
However, the type of umbrella we use today was designed less than 3 hundred years ago.
然而，我们现今用的这类伞设计还不足300年。
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