and benzoic hydrocarbon is recycled from the rich oil produced in the benzene washing step through a crude benzene distilling step.
洗苯工序产生的富油经过粗苯蒸馏工序回收苯族烃。
The development and application of an on line ultraviolet analyzer for analysis of aromatic hydrocarbon content in lubricant base oil
润滑油基础油芳烃含量在线紫外分析仪的研制与应用
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