青云翻译

Then the rich will be collected several times recrystallization acenaphthene fraction obtained high purity acenaphthene

And then collect rich acenaphthylene distillate repeatedly recrystallized high purity acenaphthene

Then will collect the rich e fraction carries on mends the crystal to make high-purity many times e

And then we will collect the rich avoid distillate for multiple crystal systems are high-purity avoid

And then collect rich acenaphthylene distillate repeatedly recrystallized high purity acenaphthene