Is that an idiot upstairs? Is SO2 flammable? There are two kinds. One is fake. Gasoline or liquefied gas or other combustible gas is mixed with oxygen, and then it is ignited and exploded by electron. This so-called "electronic salute" is called "electronic salute" only when it is ignited electronically. In fact, the trade names of these guns are oil guns and air guns. This kind of gun, like powder gun, explodes by chemical reaction, which requires flammable and explosive substances such as gasoline, gas, hydrogen and oxygen. , and the real electronic salute, directly stimulate natural air and electronic explosion to produce explosions and stimulate flash.