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Danger is usually unpredictable to water activities. This air supply equipment can provide oxygen to people who are in danger. If one cannot get rescue immediately, they can draw out the suction tube, the liquid oxygen will then become gaseous, so that they can inhale the oxygen to get more time. At the same time, the warning light on the top of this product will turn on to let lifeguards and other people know your position easier.
LIN,LIANG-JUN CHANG,JIA-YU ZHAN,ZI-LIN HUANG,CHANG-RUEI