最佳弹道 meaning in English

optimum trajectory

In view of the fact that there are three types of a hybrid base - bleed - rocket extended - range projectile and they are different from each other in the general structural layout , their structural characteristics and the work performance of the two propellant units is analyzed in this paper
本文针对三种总体结构布局形式不同的底排?火箭复合增程弹，分析了它们的结构特点和底排装置、火箭装置的工作特性，详细讨论了复合增程弹底排?火箭工作时序选择对弹道特性的影响以及实现理论上最佳弹道的匹配条件。