helicopter downing的相關(guān)資料：
臨近單詞
helicopterist
helicopter
Helicopter Ambulance Service To Emergencies
Helicopter Aerodynamics and Flight Dynamics
Helicopter Integrated Defensive Aids System
Helicopter and Airplane Services Corporation
Helicopter Anti-Submarine Warfare Squadron
Helicopter Identification by Radar Detection
Helicopter-Borne Swingfire Antitank Missile
Helicopter and Ice-breaker operation Phrases
Helicopters Incremental Power Spectrum Analyzer
Helicopter Identification by Acoustic Techniques
