Unicode 5.2
Character Definition an organic compound
Pinyin WO4
Hanyu Da Zidian position 32044.050
IRG Hanyu Da Zidian 32044.050

Unicode 12.1
Character Definition an organic compound
Pinyin Jyutping ngok3 ok3 wu1
Hanyu Da Zidian position 32044.050
IRG Hanyu Da Zidian 32044.050

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