结合实际工作中所接触的工程项目设计，探究各类型小型中央空调系统的优缺点及经济技术比较。
Combined the practical project, study the virtue and flaw of all kinds of minitype central air-conditioning system, compared the technicality and the economy of it.
光伏发电系统是否宜作为应急电源应作经济技术方面的综合分析。
Comprehensive economic and technical analysis should be made in determining whether a photovoltaic power generation system is appropriate as an emergency power supply.
硫酸消耗是磷酸生产的主要经济技术指标，降低磷酸过滤系统水溶磷的损失是降低硫酸消耗最有效的途径。
As the major economical and technical indexes in WPA production, sulfuric acid consumption is reduced alone with the decrease in the loss of the water soluble P2O5 in the WPA filtering system.
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