base of crude oil

基本解釋

Dalian is an important crude oil reserves and refining and chemical base of China and its crude oil demand is very big.
大連是國家重要的原油儲備以及鍊化基地，對進口原油的需求量較大。
According to the composition of Category: paraffin-based crude oil, naphthenic oil and three types of intermediate base crude oil;
按組成分類：石蠟基原油、環(huán)烷基原油和中間基原油三類；
The process technique of lubricating base oil with sour crude abroad was described; the technical measures for solving some problems were also given.
介紹了國外用含硫原油生産潤滑油基礎油的工藝和解決有關問題的技術措施。