短语词组短语ballistic missile body 弹道导弹弹体ballistic entry body 进入大气层的弹道体ballistic c body 弹道体tungsten alloy ballistic body 钨合金弹芯Ballistic Resistance of Body Armor 防弹衣的弹道防御ballistic re -entry body 再入大气层的弹道体 返回 ballistic body