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.
文章通过对中小型高校图书馆读者工作现状的分析，探究读者工作可改进之处，对于读者工作再建提出一些建议。
The article makes analysis of the present situation of the assistance to readers, probes into the room for improvement, and makes some Suggestions to the library service.
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