Ключевые слова: accuracy, architecture, bar, beam, building, business, carpenters, civil, column, concrete, construction, contractor, crane, danger, design, development, engineer, engineering, equipment, fabricate, form, hat, helmet, industrial, industry, install, instrument, job, material, metal, people, professional, project, quality, reinforcement, safety, scaffolding, site, slab, steel, strong, structure, task, timber, wall, wire, work, worker, workers,