#Armillary spheres, planetaria, astronomic orbits, atomic models, molecular models #Natural phenomena #Arrows #Surfaces or backgrounds covered with repeated geometrical figures, figurative elements or inscriptions #Atomic models, molecular models, representations of human, animal or vegetal cells #Luminous sources, rays, shafts of light #Bubbles, frothy masses, speech bubbles #More than two arrows #Arrows combined with any other figurative element (except A 24.15.13 and A 24.15.15) #Arrows forming a circle, an arc of a circle or a ring #Arrowheads #Surfaces or backgrounds covered with hatching