yellow, blue and red helmets with walkie-talkies.

safety helmet walkietalkie building power plant contractor worker industry environment production flooring engineer construction heavy headgear architect background blue employment engineering equipment factory hardhat job plastic radio communication red refinery sky work yellowhelmet danger electricity architecture blur builder business closeup color energy hat hood holding dominate industrial object professional protection yellow helmets walkie-talkies projects -ground plants working people engineers workers concept ets walkie-talkies