Ключевые слова: architect, attention, black, build, builder, civil, concentrated, concept, confident, construction, contractor, danger, doing, engineer, engineering, executive, finger, forbidden, foreman, gesture, hand, hardhat, helmet, hispanic, inspector, job, labor, male, man, middleaged, no, open, portrait, repairman, risk, safety, serious, showing, sign, signboard, signs, stop, thinking, thoughtful, uniform, warning, work, worker, working,