英文關鍵字
air
aircraft
airforce
america
american
army
attack
aviation
back
battle
blade
camouflage
cargo
chinook
chopper
combat
control
defense
engine
flight
fly
force
helicopter
hover
landing
marine
metal
military
mission
model
morning
movement
nato
pilot
radio
rotor
russia
sea
sky
soldier
sunrise
transport
transportation
twin
two
usa
war
warfare
weapon