Presents the selection of cold and heat sources and design of the air system, water system, smoke control system and control system.

介绍了冷热源的选择及空调风系统、水系统、防排烟系统、自控系统设计。

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Presents the selection of cold and heat sources and design of the air system, water system, control system and the safety measures for main equipment room in a air-conditioning application.

介绍了冷热源的选择及空调风系统、水系统、自控系统设计及主机房采取的安全措施，并做了几点设计总结。

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As the characteristics of different oils in the industrial waste water and pollution sources of the railway enterprises, the non dispersion infrared photometry is the first selection.

根据铁路主要企业含油工业废水中油种来源及污染源特点，非分散红外光度法为首选方法。

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