機器
ac
air
air conditioning
background
building
cold
commercial
compressor
condenser
condition
conditioner
conditioning
construction
control
cool
cooler
cooling
electric
electrical
electricity
energy
engineer
engineering
equipment
factory
fan
heat
hvac
industrial
industry
machinery
maintenance
metal
outside
power
pump
refrigerant
refrigeration
refrigerator
repair
repairman
roof
service
system
technician
technology
temperature
unit
ventilation