| 摘要 |
A turning restriction device for a handle includes a wheel strut and a handle tube. The wheel strut is inserted into the handle tube. The wheel strut comprises a block protruding from a lower section. The handle tube comprises a sleeve. The sleeve has an arcuate trough and the handle tube has an arcuate recess corresponding to the block so that the block is confined to move or to slide along the arcuate recess and within the defined area by the arcuate trough.
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