機器
air
background
building
ceiling
conditioning
construction
control
cool
cooling
electric
electrical
energy
engineer
engineering
equipment
fan
heat
home
house
hvac
indoors
industrial
industry
installation
installing
interior
job
maintenance
male
man
mechanic
metal
modern
person
pipe
pipeline
repair
repairman
residential
service
steel
system
technician
technology
tool
tube
ventilation
work
worker
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