Ключевые слова: activity, architecture, ball, blue, bolt, boom, building, cable, cargo, cement, chain, concrete, construction, crane, design, development, employment, engineer, engineering, equipment, frame, growth, heavy, hoisting, hook, industry, iron, lift, machine, machinery, market, metal, occupation, picking, plan, plank, recruitment, red, rod, rope, sky, skyscraper, steel, structure, tall, toughness, tower, up, view, worker,