| 摘要 |
An umbrella includes an upper shank, an upper connecting tube, a lower shank, a lower connecting tube, and a locking ring. Thus, the stop flange of the locking ring is rested on the catch flange of the upper connecting tube, and the tenons of the upper connecting tube are inserted into the mortises of the lower connecting tube, so that the upper connecting tube is connected with the lower connecting tube rigidly and stably, thereby reinforcing the strength of the umbrella.
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