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効率 こうりつ向上 こうじょうじゃなかった
kōritsukōjōjanakatta

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Noun
, 
Da Copula

The past negative form of 効率向上

1. Wasn't efficiency improvement.; Wasn't improved efficiency.

Past/Perfective
, 
Negative

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効率向上じゃなかった

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