每逢发生重大火灾，在火灾中遇难的人中，真正被火烧死的为数并不多，而被烟熏死的却占大多数。那么，万一发生火灾，应如何对付呢？为避免烟尘的危害，在扑救火灾时，需根据燃烧情况和火场条件，及时有效地排除烟尘。常用的排烟方法有自然排烟、机械排烟、水枪排烟和破拆排烟 In every major fire, among those who died in a fire, there were not many people actually burned to death but the majority were smoked and died. So, in case of a fire, how to deal with it? In order to avoid the harm of smoke and dust, when fighting a fire, it is necessary to timely and effectively remove smoke and dust according to the burning conditions and fire conditions. Common exhaust methods are natural exhaust, mechanical exhaust, water cannons and smoke dismantling smoke