目前常用的泡沫灭火器是铁壳的,因不耐腐蚀,使用数年后便锈穿了,只好报废,给基层单位增加了经济负担.建议在铁壳内喷上一层塑料,这样才能经久耐用,发挥效益. The commonly used foam fire extinguishers are iron shells. Because they are not resistant to corrosion, they are rusted after being used for several years. They have to be scrapped and have increased the economic burden on grass-roots units. It is recommended that a layer of plastic be sprayed into the iron shell so as to be durable. , play benefits.