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When you play in the water at the beach, in an accident, you can open the buoy wear on the arm of the switch, at this time will be inflated within the buoy, and be formed around the surface of the buoy protection balloon, can prevent the danger caused by suddenly. The buoy is not only very light and convenient to carry, but also for the people play in the water to provide a security guarantee.
National Taiwan Normal University
Kai-Yu Wu Yu-Te Lin Cheng-Ta Chiang Jih-Kuei Fan