機器
3d rendering
aeroplane
air
aircraft
airplane
airscrew
aluminum
aviation
blade
blades
circle
closeup
detail
energy
engine
engineering
equipment
fan
flight
gray
industrial
industry
jet
large
material
mechanic
mechanical
metal
metallic
motor
nobody
part
plane
power
propeller
reliability
rotor
speed
spiral
steel
technology
titanium
transport
transportation
turbine
turbo
turbojet
turning
wind