直升机运动仿真
helicopter motion simulation
直升机载长程主动声纳
heliborne long-range active sonar (Helraps
直升机载导弹
air-to-air missile for helicopter
直升机载频率域电磁系统
helicopter-borne frequency domain electromagnetic
三自由度直升机系统
three degrees of freedom helicopter system
3 DOF helicopter