機器
automatic
breaker
cabinet
cable
checking
circuit
connect
connection
control
current
electric
electrical
electrician
electricity
energy
engineer
engineering
equipment
factory
industrial
industry
installation
maintenance
measure
measurement
meter
panel
power
repair
repairman
safety
service
services
supply
switch
switchboard
switchgear
system
technical
technician
technology
transformer
voltage
wiring
work