在园区的六家公司中，中石油的子公司——大庆炼化是最大的。
Of the six companies operating in the park, the largest is Daqing Lianhua, a PetroChina subsidiary.
介绍了大庆炼化公司第三循环水场在线清洗的方案制定过程及清洗结果。
The process and its result of the on-line cleaning program in the third circulating water system of Daqing Refining & Chemical Company are introduced.
为提高酮苯装置脱油蜡收率，大庆炼化公司于2004年对工艺进行了改进。
The technical modification of ketone-benzol unit to improve the deoiling yield in Daqing Refining and Chemical Company was carried out in 2004.
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