機器
air
airconditioning
appliance
background
big
blower
boiler
building
chill
chiller
climate
cold
commercial
compressor
conditioner
conditioning
construction
cool
energy
engineer
engineering
equipment
factory
fan
frame
industrial
industry
infrastructure
large
machinery
manufacturing
metal
modern
outer
outside
pipe
pipeline
plant
pump
radiator
refrigerant
silver
system
technology
tower
unit
ventilation
ventilator
water