Ключевые слова: actively, activity, arc, boom, bucket, building, civil, construction, danger, device, diligent, engineering, equipment, excavator, floor, heavy, industrial, industry, instrument, join, laborer, machine, machinery, man, melt, metal, metalwork, operator, place, plank, plate, power, press, put, road, safety, seam, set, site, spark, steel, strength, team, technician, tool, welder, welding, work, worker, workman,