In this paper, the basic concept and characteristics of thin-walled castings are introduced.
介绍了薄壁铸件的概念和基本特征。
The paper analyses various methods of risk analysis and gives out basic concept and characteristics of risk.
该文分析了各种风险分析方法，给出了风险的基本概念和风险的特有属性。
The paper analyses Grid's security combining with its basic concept and characteristics and explains its implement with GSI.
本文结合网格基本概念和特点对网格的安全性进行分析，并结合网格安全基础设施GSI阐述了网格的安全实现。
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