機器
air
check
circuit
cold
commercial
compressor
condenser
condition
conditioner
conditioning
control
cool
electric
electrical
electrician
electricity
energy
engineer
engineering
equipment
hvac
industrial
industry
iron
machinery
maintenance
mechanical
panel
power
professional
repair
repairman
service
solder
soldered
soldering
support
system
technical
technician
technology
tool
transistor
ventilation
ventilator
wire
wiring
worker