三大发展特点特点之一——研究多部署少 60～80年代,随着携带核弹头的战略弹道导弹的部署型号和数量日益增加,美国和原苏联都把对战略弹道导弹的防御作为反弹道导弹武器发展的重点,力图在确保第一次核打击能力的基础上使自己免遭对方大规模核报复。为了争夺优势,美国和原苏联提出的弹道导弹防御方案至少有30多种,然而,双方最终完成的只有3个,其中美国两种,一 As one of the characteristics of the three major development characteristics - the study of multi-deployment Less 60 to 80 years, with the deployment of nuclear warheads strategic ballistic missiles increasing the number and model of deployment, the United States and the former Soviet Union put the strategic ballistic missile defense as an anti-ballistic missile The focus of arms development has sought to protect itself against the massive nuclear retaliation on the basis of ensuring the first nuclear strike capability. In order to gain the upper hand, the United States and the former Soviet Union proposed at least 30 kinds of ballistic missile defense programs. However, the two sides finally completed only 3 of them, of which the U.S. two and one