green

communication

system

protection

object

breaker

sky

box

electrical

electricity

technology

power

industry

electric

wire

equipment

cable

energy

industrial

colorful

construction

line

electrician

connection

color

distribution

wiring

installation

black

engineering

danger

shield

voltage

business

blue

electronic

technical

steel

male

maintenance

hardhat

helmet

engineer

modern

worker

concept

professional

circuit

computer