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化学 かがく的 てき酸素 さんそ要求 ようきゅう量 りょうでした
ka gakuteki sansoyō kyūryōdeshita

敬
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Noun
, 
Desu Copula

The polite past form of 化学的酸素要求量

1. Biochemical oxygen demand was.

Past/Perfective
, 
Polite

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化学的酸素要求量でした

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