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ナフテン系けい炭たん化か水すい素そ
Meanings
Noun
1. naphthenic hydrocarbon
Kanji used
系
lineage
炭
charcoal
化
transformation
水
water
素
elementary
Composed of
system; lineage; corollary; system (range of strata that correspond to a particular time period); (taxonomical) series
hydrocarbon