Ключевые слова: architect, architecture, background, blue, building, business, color, concept, construction, contractor, design, employment, energy, engineer, engineering, equipment, factory, hard, hardhat, hat, head, headgear, health, healthy, helmet, industrial, industry, inspection, interior, job, maintenance, orange, plan, plant, plastic, prevention, protect, protection, protective, safe, safety, security, structure, tool, white, work, worker, workman, yellow,