base of crude oil

基本解释

Dalian is an important crude oil reserves and refining and chemical base of China and its crude oil demand is very big.
大连是国家重要的原油储备以及炼化基地，对进口原油的需求量较大。
According to the composition of Category: paraffin-based crude oil, naphthenic oil and three types of intermediate base crude oil;
按组成分类：石蜡基原油、环烷基原油和中间基原油三类；
The process technique of lubricating base oil with sour crude abroad was described; the technical measures for solving some problems were also given.
介绍了国外用含硫原油生产润滑油基础油的工艺和解决有关问题的技术措施。