英文關鍵字
amps
appliance
arm
cable
circuit
closeup
concept
connect
connection
conserve
cord
danger
electric
electrical
electricity
energy
finger
hand
hold
house
indoors
outlet
pin
plug
power
pull
remove
safety
saving
socket
stand
stress
supply
technology
unplug
unplugging
volts
wall
watts
white
wire