(一)扑灭A类物质初起火灾的灭火工具,有泡沫灭火器、清水灭火器、酸碱灭火器和通用干粉(即A、B、C干粉)灭火器。目前,除通用干粉灭火器尚在研制外,其他灭火器均已大最生产。不过酸碱灭火器因腐蚀性较大,灭火效果与清水灭火器差不多,准备逐渐淘汰,发展清水、泡沫和通用干粉灭火器的生产。现将泡沫、清水、酸碱等灭火器的性能、使用方法和维护保养分别介绍如下: (A) Extinguishing media for the initial fire of Class A substances include foam fire extinguishers, fresh water fire extinguishers, acid-base fire extinguishers and universal dry powder fire extinguishers (ie dry powders A, B and C). At present, in addition to general dry powder fire extinguisher is still being developed, other fire extinguishers have been the most production. However, acid-base fire extinguishers due to greater corrosion, fire extinguishing effect and water almost, ready to gradually eliminated, the development of water, foam and general dry powder fire extinguishers production. Now foam, water, acid and alkali fire extinguisher performance, use and maintenance are introduced as follows: