发射药 gun propellant
propellant powder
- 发射药, 火箭燃料推进或提供爆炸的物体,比如爆炸炸药或火箭燃料。
Something, such as an explosive charge or a rocket fuel, that propels or provides thrust. - 结果表明:PET预聚体为2官能度时,随着其相对分子质量的增加,发射药冲击性能明显下降;
The results show that when molecular mass of PET prepolymer with 2 functional groups increases, impact strength of JMZ gun propellant descends . - 之后,金属子弹(包含弹头、发射药、炸药、底火)的发明使气密和枪尾装弹的机制发展起来。
Somewhat later, the invention of metallic cartridges (containing bullet, propellant, charge, and powder) permitted the development of gas-tight, breech-loading mechanisms.