Ключевые слова: 20s, architecture, bucket, build, builder, building, cement, concrete, construction, constructor, contractor, development, dirty, employment, engineering, equipment, hand, home, house, indoor, industrial, industry, job, labor, machine, machinery, male, man, manual, mason, masonry, material, men at work, mix, mixer, mixing, mixture, mortar, occupation, person, professional, repair, safety, sand, site, structure, tool, work, worker, working,