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The Wrist life-saving device used the awareness gas to send message for help. Since the particular gas is lighter than the air, as long as you gently press the switches for only 2 seconds, the inner gas would begin to diverge along the cracks of the bricks and the soil to the ground. As the rescuer dog is very sensitive to the smell, it could help the rescuers find the exact location of the trapped one more quickly. Besides, the smell of the gas has the effect of refreshing, so it can help the trapped person get through the difficulty.
East China Normal University
Professor Mr.Wang Dazhou & Professor Huang Yingjie
Wu Yihao（koizumi Design China) & Yang Wenbo(Samsung Design Membership China)