ROHR-IDRECO

#Natural phenomena #Surfaces or backgrounds covered with repeated geometrical figures, figurative elements or inscriptions #Quadrilaterals #Lines, bands #Letters presenting a special form of writing #Colours #Waves, sound and micro waves. #Surfaces or backgrounds covered with circles or ellipses #Surfaces or backgrounds covered with dots, spickled, recycled paper-like surfaces #Squares #Quadrilateral figures with one or more convex or concave sides, quadrilateral with one side curved #Several quadrilaterals juxtaposed, joined or intersecting #Quadrilaterals containing one or more circles, ellipses or polygons (specify the content) #Quadrilaterals with dark surfaces or parts of surfaces #Wavy lines or bands, zigzag lines or bands #Letters in heavy characters #Three predominant colours