The first step was to establish economic evaluation model.
首先，建立经济评价模型。
A technical and economic evaluation model was established on the reservoir adaptability of polymer flooding technology.
建立起聚合物驱油技术的油藏适应性经济评价模型。
The forth chapter discusses the economic evaluation model based on the inferior constraint and the empirical research of sub-provincial cities.
第四章基于次约束的经济评价模型及对副省级城市的实证研究。
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