機器
abstract
air
alloy
background
blade
circular
close
closeup
construction
dark
detail
electricity
energy
engine
engineering
equipment
factory
fan
force
industrial
industry
jet
light
metal
molecular
motor
mover
nobody
object
power
precision
pressure
propeller
pump
rotor
steel
strength
sun
sunlight
turbine
turbo
up
vacuum
vane
ventilator