Ключевые слова: activity, architecture, builder, building, business, cement, chemical, concrete, construction, crane, development, ecology, energy, engine, engineer, engineering, environment, environmental, equipment, estate, factory, frame, helmet, house, industrial, industry, job, landscape, machine, machinery, man, manufacturing, occupation, outdoor, people, pollution, power, project, safety, silhouette, site, sky, smoke, structure, technology, unfinished, work, worker, working, workplace,