機器
ac
air
apartment
appliance
brush
business
check
clean
cleaning
cold
conditioner
construction
cooling
dust
electric
electrician
electricity
engineer
equipment
fix
happy
heat
home
hot
house
install
maintain
maintenance
man
mask
medical
office
people
professional
repair
repairman
room
screwdriver
service
smiling
summer
technician
technology
unit
ventilation
wall
washing
work
worker