人们常说日夜有三防:防火、防盗、防交通事故。其中防火乃为三防之首,可见其危害之大。全国各地每年因为火灾所造成的生命、财产损失是惊人的。但在引起火灾的诸多原因中,由于所用的电器设备年久失修、电路电线的陈旧老化等引起的电气短路、打火而产生的火灾占有很大的比例。 People often say that there are three anti-day and night: fire, anti-theft, anti-traffic accidents. Among them, fire prevention is the first of the three defenses, showing that it is very harmful. The loss of property is alarming every year throughout the country because of the fire. However, among the many causes of the fire, fires caused by fires occupy a large proportion due to the electrical short circuits caused by the disrepair of the electrical equipment used and the aging of the circuit wires.