Generally, it contains heavy weight which if the user need to get closed at the fire base at least 1.5 meter or around 6 feet and to feed the chemical to extinguish the fire, it is not enough free and safe for the user because of it heavy weight. Moreover, the feeding fire extinguishing tank need to be used along to 16 seconds at the fire base to feed out all of the chemical which truly the fire can spread out fast. If the fire ignites, the victim has the time to survive not much enough. There are 3 steps of the fire ignition as;
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