Ключевые слова: action, activity, architecture, assembly, background, builder, building, clamps, clouds, construct, construction, daylight, frame, framework, hammer, harness, helmet, job, male, man, manual, metal, occupation, outdoor, people, plank, poles, profession, progress, rail, safety, scaffold, site, sky, space, steel, structure, tools, tradesman, upright, vertical, wood, work, worker, workman,