機器
air
air condition
air conditioner
air conditioning
blades
blow
building
circle
cold
commercial
compressor
condition
conditioner
conditioning
control
cool
coolant
cooling
detail
duct
electric
electrical
equipment
fan
frame
grille
guard
heat
high
hot
hot air
hot air balloon
industrial
industry
machinery
metal
outside
pattern
power
rotate
round
steel
structure
technology
temperature
unit
vent
ventilate
ventilation
ventilator
warm