three-throw turnout；symmetrical three throw turnout；three-way turnout
6-D ballistic trajectory
a ballistic missile defense
air pressure ballistic lithoclasty
air-launched ballistic missile
air-launched ballistic missile (ALBM)
All ballistic simulation
Analysis of Ballistic Parameters
Anti-ballistic Capability
anti-ballistic mechanism
anti-ballistic missile (ABM)
Anti-Ballistic Missile agreement
anti-ballistic missile launcher
Anti-ballistic missile system
anti-ballistic missile systems
Anti-ballistic Missile Treaty (ABM)
anti-intercontinental ballistic missile (AICBM)