Ключевые слова: abstract, arrow, burst, center, circle, circular, circulate, clockwise, concentric, cursor, cw, eddy, element, emission, epicenter, gyration, gyre, helix, index, line, lines, midpoint, orientation, pointer, radial, radiant, radiating, radiation, radius, ray, right, rings, rotate, rotation, segment, segmented, segmented circle, shape, spin, spire, stripe, swirl, twirl, twist, volute, whirlpool, whirlwind,