機器
adult
air
background
building
ceiling
cleaner
conditioner
conditioning
construction
control
cool
cooling
duct
dust
efficiency
electric
electrical
equipment
fan
heat
home
house
indoors
industrial
industry
installation
installing
interior
job
maintenance
male
man
mechanic
men
modern
person
pipe
repair
repairman
residential
safety
service
system
technician
technology
tool
ventilation
work
worker