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メタン系 けい炭化 たんか水素 すいそではありませんでした
metankeitankasuisodewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of メタン系炭化水素

1. Was not a methane-based hydrocarbon.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register

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メタン系炭化水素ではありませんでした

メタン系炭化水素ではありませんでした【メタンけいたんかすいそでわありませんでした】 Activity

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