英文關鍵字
amper
appliance
battery
blood
center
closeup
component
computer
control
digital
display
electric
electrical
electricity
electronics
energy
equipment
gauges
generation
industrial
industry
instrument
measurement
nobody
number
peripheral
plastic
power
protection
protective
push
regulator
reliability
safe
screen
stability
stabilizer
supply
switch
switcher
technique
technology
temperature
tool
unit
voltage
volts