Ключевые слова: architect, background, blue, build, building, business, civil, color, construction, contractor, copy, engineer, engineering, equipment, factory, foreman, hang, hanging, hard, hard hat, hardhat, hat, head, helmet, industry, job, labor, maintenance, many, object, plastic, project, protect, protection, row, safe, safety, site, space, tools, vertical, wall, white, wood, work, worker, workers, workman, yellow,