英文關鍵字
automated
automatic
box
checking
closeup
connection
connector
consumption
control
electrical
electricians
electricity
emergency
energy
engineering
factory
finger
generator
hand
industry
launched
light
male
man
manual
manually
on
panel
plug
power
push
safety
service
spread
station
switch
switchboard
switcher
switches
switchgear
system
technology
toggle
tumblers
turn
turning
volt
voltage
work
worker