| 摘要 |
PURPOSE: A pneumatic lock for a bicycle is provided to generate a warning tone when a thief cuts the same. CONSTITUTION: A pneumatic lock (10) for a bicycle includes an iron core binding the bicycle, an air tube, and a warning unit (14). The air tube is filled with compressed air. The air tube binds the bicycle together with the iron core. The warning unit at the air tube generates a warning tone when the air tube is cut.
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