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Vienna Classification of Figurative Elements

Letters or numerals forming a plano-concave figure A 27.1.9

构成平凹图形的字母或数字

Chinese 构成平凹图形的字母或数字
English Letters or numerals forming a plano-concave figure
Spanish Letras o números que forman una figura plano-cóncava
Code
A 27.1.9
Version
Vienna Classification, 10th edition (VCL 10, in force from 1 Jan 2026); English from the WIPO official text, Chinese is a J&C reference translation