naphthenic-base crude 环烷基原油...naphthenic soap 环烷皂...naphthenic oil 环烷油...naphthenic base 环烷基...naphthenic residual oil 环烷基渣油...naphthenic lube oil 环烷基润滑油...naphthenic hydrocarbon 环烷烃...naphthenic (base) crude (oil) 环烷基石油...naphthenic acid 环烷酸;环酸;环己烷甲酸...commercial naphthenic acid 求工业用环烷酸,商品脂环酸...
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