機器
abstract
aged
air
air conditioner
appliance
background
blurred
climate
condenser
conditioner
cooling
damaged
dirty
distiller
duct
dust
electric
equipment
fan
filthy
gray
grid
grille
home
household
industrial
mesh
messy
object
old
old fan
powder
problem
propeller
ragged
refrigeration
repair
rotate
rough
selective focus
surface
system
technology
texture
turbine
unclean
ventilation
wind