Ключевые слова: boom, boom crane, build, building, building activity, cable, construction, construction equipment, construction site, crane, crane boom, dig, digging, engineering, equipment, excavation, gantry crane, gravel, heavy duty, highrise, hoist, industrial, iron, jobsite, lift, machine, machinery, operate, pulley, sand, steel, steel cable, structural steel, structure, tall, towering,