機器
ac
air
air conditioner
air conditioning
au
auto
automobile
automotive
background
business
car
car service
check
closeup
compressor
condition
conditioner
conditioning
cool
cooling
engineer
equipment
gauge
hvac
industry
leak
maintenance
mechanic
mechanical
meter
monitoring
part
pressure
refrigerant
refrigeration
repair
repair man
repairman
service
spare
system
technical
technician
technology
tool
tools
transport
transportation
vehicle
workshop