automatic
background
box
breaker
button
circuit
close
control
current
dashboard
electric
electrical
electrician
electricity
electronic
energy
equipment
fuse
high
housing
knob
laboratory
measure
metal
meter
panel
part
phase
regulate
relay
repair
research
rotary
sensor
service
spare
station
supply
switch
switchboard
system
table
technology
tool
up
volt
voltage
watt
white
workshop
定額
Phase control relay and relay with electromagnetic coils on the table. Close up of equipment with white metal casing, switch buttons and rotary knobs, screwdrivers, relays and circuit breakers.の素材 [FY310198293900]
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