Ключевые слова: abstract, arrangement, axis, blue, cable, center, central point, circle, core, current, electric, electric power, electricity, energy, focal point, focus, form, fulcrum, heart, hole, hub, kernel, lines, middle, nerve center, nucleus, order, outdoor, outside, pattern, pivot, polestar, power, power line, radiating, sky, still life, system, voltage, wire,