英文關鍵字
metal
cool
warm
industrial
lineart
linear
coolant
cold
technology
cooling
tech
condenser
protection
tube
control
light
temperature
machine
metallic
radial
steel
heater
motion
heat
industry
air
thermostat
abstract
thermal
aluminum
refrigerant
climate
part
line
background
equipment
component
conditioner
cooler
pipe
modern
object
radiator
element
aluminium
ventilation
grey
system