surface, structure, surfaces, flow, motion, arrangement, structures, form, pattern, architecture, shape, pipe, model, plane, area, path, movement, parameters, blades, spirals, walls, symmetry, mediums, layers, texture, type, axis, thickenings, field, currents, pitch, axes, cuticle, paths, fashion, media, grooves, dislocations, impeller, wall, medium, chains, manner, motions, gears, arch, orientation, twist, wire, ramps, ramp, vanes, array, curves, rotation, spring, lamellae, colon, solution, conformation, shells, property, phase, ordering, flight, strips, framework, tube, stairs, arches, chromonema, configuration, springs, warp, curve, coordinates, fibres, bacteria, pipes, threads, gearing, construction, eggshells, wave, filaments, spiral, rows, groove