Smoke produced by the fire hazard of electrotechnical products contains toxic products, at the same time, its obscuration (opacity) impedes victims escaping from the fire and causes casualty.

• 当电工电子产品陷入火灾后因燃烧而产生的烟雾,除含有毒性物质外,其模糊性(不透明性)会妨碍受害者逃生而造成伤亡。