機器
3d
air
background
blow
building
circle
climate
cold
conditioning
cool
cooler
cooling
cutout
electric
electrical
electricity
element
energy
engine
equipment
fan
gas
heat
heater
industrial
industry
isolated
large
machinery
metal
new
power
radiator
round
space
steel
technology
temperature
thermal
turbine
unit
ventilate
ventilation
ventilator
white
wind