Characters

凸凸
CEDict 100318
Traditional 凸凸 Simplified 凸凸
Pinyin tu1 tu1
English convex on both sides ( of lens ) ; biconvex

凸凸
CC-CEDict 200217
Traditional 凸凸 Simplified 凸凸
Pinyin tu1 tu1
English convex on both sides ( of lens ) ; biconvex

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