機器
aerial
aerodynamic
aeroplane
aerospace
air
aircraft
airplane
aluminum
aviation
background
blade
chamber
closeup
combustion
complex
component
design
detail
dynamic
electronic
energy
engine
engineering
fan
fuel
industrial
industry
jet
machinery
mechanical
metal
motor
plane
power
powerful
pressure
propeller
rotate
science
speed
spiral
steel
structure
technology
thrust
transport
turbine
turbo