機器
abstract
aerospace
air
aircraft
airplane
alloy
aviation
background
blade
close
construction
detail
energy
engine
engineering
equipment
factory
fan
force
gas
generator
heavy
industrial
industry
jet
machinery
manufacture
manufacturing
metal
metallic
motor
new
object
part
plane
power
precision
propeller
repair
rotor
steam
steel
technology
texture
turbine
turbo
up
wind
workshop