| 摘要 |
The present invention relates to a length adjustable racket, and to a racket which length can be adjustable by using a triangular pyramid bolt and a side-opening nut. More specifically, by using a triangular pyramid bolt and a side-opening nut, the racket length can be adjusted. According to an embodiment of the present invention, it is advantageous to be able to exercise in a small room. |
