Economic efficiency analysis of population control.
人口控制的经济效益分析。
This article narrated the high-pressured frequency changer in iron-smelting dust removal system transformation analysis as well as the economic efficiency analysis.
】本文讲述了高压变频器在炼铁除尘系统中的改造分析以及经济效益分析。
Through environmental quality analysis, health effect evaluation and economic efficiency assessment, initially proved interfering effects of centralized heat suPPly measures on the environment.
通过对环境质量分析、健康效应评价和经济效益估算，初步论证了集中供热措施的环境干预作用。
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