機器
air
air conditioner
air conditioning
background
business
check
compressor
condition
conditioner
conditioning
cool
cooling
detection
electric
electrical
engine
engineer
equipment
filling
fix
fixing
heat
hvac
industrial
industry
installing
maintenance
measure
mechanic
metal
meter
outdoor
pump
refrigeration
refrigerator
repair
repairman
service
system
technical
technician
technology
tool
transportation
vacuum
vehicle