Ключевые слова: activity, background, beware, black, blank, board, build, building, cable, color, construct, construction, crane, design, development, elevator, engineering, equipment, frame, heavy, hoist, hook, illustration, industrial, industry, isolated, lift, lifting, load, machine, machinery, metal, nobody, one, part, rope, sign, steel, strength, tool, tools, traffic, transportation, under, up, weight, white, winch, work, yellow,