機器
aerial
air
airborne
aircraft
airshow
army
aviation
blade
blades
chopper
dawn
day
emergency
engine
fleet
flight
fly
flying
forces
helicopter
help
hover
hovering
midair
military
motion
patrol
pilot
plane
police
power
propeller
protection
rescue
rotate
rotor
route
search
silhouette
sky
speed
spin
sunlight
support
transport
transportation
vehicle
war
work