商城购物APP开发 原生系统搭建

Gunpowder is one of the four great inventions in China. Underthe action of appropriate external energy, it can carry out rapidand regular combustion and produce a large number ofhigh-temperature gas substances at the same time. 

商城购物APP开发   原生系统搭建开发

It is an important part of ammunition, which is mainly used asthe energy source of gun, projectile, rocket, missile propellantand other driving devices in military.

From practical experience or deliberate experiments, alchemistsknow that mixing proper amount of sulphur with nitrite and charcoalwill ignite or even explode. Ge Hong, a famous Taoist scholar inthe Jin Dynasty, used realgar, nitrite, lard colon oil and pineresin in his book Baopuzi Xianyao Paper.