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The air filter ball is an invention specially designed for fire fighting and disaster relief. Studies have shown that the death rate of choking in a fire is much higher than that of burns. Because there are many toxic substances hidden in the thick smoke, it not only does great harm to human body, but also causes trachea or skin burns due to high temperature smoke. The air filter ball is a powerful air filter with a diameter of only 15 cm. When the high temperature is detected automatically, the air replacement will be started to quickly replace a large amount of smoke in the ball into non-toxic air.