helicoptersn.直升机名词helicopter的复数形式.helicoptern.直升飞机vt.用直升飞机载送vi.乘直升机Helicopter Instrument Rule直升机仪表使用规则Helicopter Flight Director直升机飞行指挥仪Helicopter Control Station直升机控制站Helicopter Supported Radar直升机支援雷达Helicopter Subcontrol Ship直升机辅助控制舰Helicopter Flight Squadron直升机飞行中队Helicopter Assault Primary直升机初级攻击Helicopter Control Trainer直升机控制训练员helicopters control system直升机控制系统helicopter acoustic signal直升机声信号