機器
abstract
air
background
big
black
blade
color
computer
condition
conditioner
conditioning
construction
cooler
cooling
detail
electric
engine
equipment
factory
fan
freezer
gray
grunge
horizontal
industrial
industry
jumbo
large
machinery
mechanic
mechanical
modern
motor
one
photo
power
rotate
rotating
round
system
technology
turbine
ventilate
ventilation
ventilator
view
white