機器
assembling
automatic
automation
cable
circuit
circuitry
closeup
coil
common
component
connect
connection
connector
contact
contactor
control
cubicle
current
device
electric
electrical
electricity
electronic
element
energy
engineering
equipment
factory
fuse
industrial
metal
mount
panel
power
relay
signal
station
switch
system
technical
terminal
voltage
wire
wires