分析支架液压系统的污染原因及危害，提出基本控制方法。
This paper analyses pollution reason and harm of supports hydraulic system, puts forward basic controlling methods.
为了拓展和优化人类生存空间，对公路灾害的类型与危害进行了系统分析，并提出了防减灾的措施。
In order to extend and optimize human living space, the article analyzes comprehensively the road disaster and its danger, furthermore puts forward some measures to prevent and reduce the disaster.
系统介绍了危害分析和关键控制点(HACCP)在评价小区直饮水供水水质安全中的应用。
Application of Hazard Analysis and Critical Control Points (HACCP) to evaluate water quality security of fine drinking water is introduced.
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