adjusting
adult
ammeter
automated
background
board
box
console
control
device
display
electric
electrical
electrician
electricity
electronic
energy
engineer
equipment
factory
green
indicator
industrial
industry
instrument
light
machine laver
machinery
manufacturing
metal
off
old
panels
plant
power
push
red
safety
scale
sign
station
supply
switch
system
technical
technology
vintage
white
work
yellow