haptisches figurenset consisting of several unterscheidbaren groups with different stable characters, characterized by the fact that each character has a uniformly coated surface, the characters within a group of different sizes, and compared with the fig the other groups uren surfaces are coated.rauigkeiten, distinguishable.different surface finishes and structures ordifferent weichheiten showand the differentiation between the surfaces of two characters at least chosen is that they just tactilely distinguishable.
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