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ニオブ酸 さんではありませんでした
niobusandewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of ニオブ酸

1. Was not niobium acid.; Was not a niobium acid.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register
, 
Chemistry

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ニオブ酸ではありませんでした

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