variable burning rate gun propellant

• 变燃速发射药

variable burning rate gun propellant的用法和样例：

例句

1. By the changes of thickness of the crazes with temperature, the burning area of the propellant is changed and the desire discharge rule of the propellant is realized.
   通过银纹厚度随温度的变化，调整发射药的燃烧面积，使变燃速发射药具有所希望的能量释放规律。