ナフテン けい炭化 たんか水素 すいそであれば
nafutenkeitankasuisodeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of ナフテン系炭化水素

1. if it is a naphthenic hydrocarbon; if naphthenic hydrocarbons are present

Ba Conditional