Characters

雙凸面
CEDict 100318
Traditional 雙凸面 Simplified 双凸面
Pinyin shuang1 tu1 mian4
English convex on both sides ( of lens ) ; biconvex

雙凸面
CC-CEDict 200217
Traditional 雙凸面 Simplified 双凸面
Pinyin shuang1 tu1 mian4
English convex on both sides ( of lens ) ; biconvex

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