a weapon that is forcibly thrown or projected at a targets but is not self-propelled
any vehicle self-propelled by a rocket engine
造句
Use of two-stage light gas guns is one of the techniques extensively used to achieve hypervelocity projectiles. 二級輕氣炮是超高速彈丸驅動技術中使用最廣泛的技術之一。
Finally, for flight projectiles with different initial conditions, the radian characteristic of different spectral bands is analysed. 最后分析了彈丸以不同初始條件飛行時在不同光譜波段內的輻射特點。