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過 か硫酸 りゅうさんじゃなかった
karyūsanjanakatta

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Noun
, 
Da Copula

The past negative form of 過硫酸

1. Was not persulfate.; Wasn't persulfuric acid.

Past/Perfective
, 
Negative

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過硫酸じゃなかった

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