機器
ac
air
background
blue
broken
building
climate
cold
commercial
compressor
condition
conditioner
conditioning
cool
cooling
duct
electric
electricity
equipment
exhaust
exterior
fan
fixture
heat
heating
illustration
industrial
industry
machinery
metal
new
office
outdoor
power
repair
roof
rooftop
sky
skyscraper
structure
system
technology
temperature
top
unit
units
vent
ventilation
view