英文關鍵字
alternating
automatic
automation
blue
board
box
breaker
change
checking
circuit
closeup
component
connect
construction
control
current
cycle
distribution
electrical
electrician
electricity
electronics
energy
engineer
equipment
feed
fuse
fuseboard
fusebox
ground
home
industry
installation
line
off
office
panel
power
protection
safety
service
supply
switch
system
technical
voltage
white
work