| 摘要 |
An adjustable pumping device for a hydraulic brake device of a bicycle includes a body mounted to a handlebar of the bicycle and having a first tunnel defined therein for containing oil. A main cylinder is disposed in the body and pumps oil to the hydraulic brake device of the bicycle. A lever is pivotally mounted to the body and has an adjuster mounted in the lever for adjusting an ineffective stroke of the main cylinder.
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