The relation of the microstructures and the properties in aspect of retained austenite(Ar) , undissolved carbide(Cr) and martonsite tempered content has been analyzed.

并从残余奥氏体、未溶碳化物和马氏体回火程度几个方面分析了组织和性能之间的关系。

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AR-2 environment protective monitor with dual room parameters was detailed introduced with aspect of its working characteristics and principles.

对AR 2型室内双参数环境监测保护设备的工作特点进行了介绍，并对其工作原理进行了详细地分析。

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