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エチレン系 けい炭化 たんか水素 すいそじゃなかった
echirenkeitankasuisojanakatta

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Noun
, 
Da Copula

The past negative form of エチレン系炭化水素

1. Wasn't an ethylene-based hydrocarbon.

Past/Perfective
, 
Negative

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エチレン系炭化水素じゃなかった

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