| 摘要 |
An adjustable dumbbell is disclosed consisted of a revolving shaft clamped with a clamping plate and coupled to a solid rod inserted in a tube, a catch pivotally connected to the tube at one end to hold down the solid rod, a cover sleeve sleeved on the tube, a guard adjustably fastened to the cover sleeve, two weights fastened to the tube at two opposite ends, two sockets respectively mounted on the weights, and two end caps respective fastened to the sockets to hold counter weights.
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