英文關鍵字
board
cable
checking
circuit
close
closeup
control
current
distribution
electric
electrical
electrician
electricity
energy
engineer
equipment
fix
hands
industrial
industry
inspector
installation
maintenance
male
man
network
opening
panel
personnel
plug
power
preventive
professional
protection
repair
repairman
safety
service
staff
switch
system
technical
technician
technology
test
up
voltage
work
worker