機器
aeroplane
air
aircraft
airline
airliner
airplane
aviation
aviator
background
black
blade
cylinder
detail
energy
engine
fan
fighter
flight
fly
force
hub
industrial
mechanic
mechanical
metal
motor
obsolete
old
piston
plane
power
propeller
radial
reflection
retro
rotor
round
runway
shiny
sky
spinner
technology
thrust
transport
transportation
travel
tubing
vehicle
vintage