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MATERIALS FOR DALTONICS AND COLOURS FOR DALTONICS
MATERIALS FOR DALTONICS AND COLOURS FOR DALTONICS
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机译:道尔顿的材料和道尔顿的颜色
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摘要
Colouring set comprising manual tools of different colours each of which comprises a body with possible indicator and a writing part of a first colour which is perceived by a colour-blind person as a second colour different from the first colour, characterised in that the body of each tool, or the relative indicator, is of the respective second colour.
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