英文關鍵字
aerial
heater
industrial
industry
large
machine
outside
propeller
heat
refrigerant
rotate
rotating
spin
spinning
system
temperature
turn
unit
ventilation
refrigerator
fan
factory
equipment
air
airflow
appliance
cooler
cooling
conditioner
conditioning
big
building
device
electrical
ventilator
cold
commercial
compressor
condition
condenser
cool
blower
wall
blowing