The system composition, test principle and key technology are introduced, and the tolerance analysis is made.

文章介绍了系统的组成、测试原理及技术关键，并进行了误差分析。

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With theory analysis, experiment research and spot test, this paper takes the lead in establishing technology system of gob-side entry retaining with large section or small one.

通过理论分析、实验研究和现场试验，本文率先在国内初步建立了由大断面、小断面沿空留巷组成的综放沿空留巷技术体系。

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The vehicle emission test management and emission data analysis have become more important with the development of test method and technology in our country.

随着我国机动车排放检测方法和技术的不断完善，对检测工作管理及检测数据分析提出了越来越高的要求。

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