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(jí)輕氣炮是超高速彈丸驅(qū)動(dòng)技術(shù)中使用最廣泛的技術(shù)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(shí)在不同光譜波段內(nèi)的輻射特點(diǎn)。