求翻译：目前我国芳烃精馏的工艺流程有两种类型：一种是三塔流程，用来生产苯、甲苯、混合二甲苯和重芳烃；另一种是五塔流程，用来生产苯、甲苯、邻二甲苯、间对二甲苯、乙基苯和重芳烃。是什么意思？

At present, China aromatics distillation process, there are two types: one is the three-tower process for the production of benzene, toluene, mixed xylenes and heavy aromatic; the other is a five-tower process for the production of benzene, toluene, o- xylene, between p-xylene, ethyl benzene and hea

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At present our country aromatic hydrocarbon selective evaporation technical process has two kind of types: One kind is three tower flows, uses for to produce the benzene, the toluene, the xylol and the heavy aromatic hydrocarbon; Another kind is five tower flows, uses for to produce the benzene, the

Currently aromatic distillation process in our country there are two types: one is a three-column process, used to produce benzene, toluene and mixed XYLENES and heavy aromatics; the other is a five-column process, for the production of benzene, toluene, ethyl o-xylene, paraxylene, benzene and aroma

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