英文關鍵字
abstract
administration
ampers
automatic
background
blue
board
box
button
buttons
close
closeup
component
control
controls
danger
device
electric
electrical
electricity
energy
equipment
highvoltage
icon
industry
instrument
keyboard
light
line
machine
macro
off
onoff
panel
position
power
red
safety
section
setup
switch
system
technical
technology
turn
volts
wall
warning