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The whirl buckle is a brand new type of the baton, designed for not dropping the baton while each runner hands it off to the next runner or while the runner starts accelerating.
The outer appearance of the baton starts from midst and stretches spirally to both ends making cylinders. This design not only makes the baton fit tightly in
runners hand, but offers the runners the sense of holding an existing object while competing.
Han Yao Ping-Chu Huang Jou-Man Wu Tz-Ting Yan