propellant charge的用法和樣例：
例句
- The variation of residual energy of propellant in ammunition after long period storage is stud-ied.
對彈藥在長期貯存過程中其發射葯剩餘能量的變化情況進行了研究。 - 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.
通過銀紋厚度隨溫度的變化，調整發射葯的燃燒面積，使變燃速發射葯具有所希望的能量釋放規律。
