本文从虚拟维修中装配拆卸模型的基本特点入手，给出了在进行虚拟维修中所需要的模型的层次化组织结构。
In this paper we begin from the feature of the assembly and disassembly modeling in the virtual maintenance, propose a layering method to assembly and disassembly modeling building.
分析了进行维修服务质量评价的重要性，建立了维修服务质量评价的层次结构，提出分析模型和计算方法，并给出了一个具体实例。
The importance of evaluation of maintenance service quality was pointed out and its hierarchy structure was constructed. Analysis model and calculation method were put forward with a specific example.
本系统通过界面友好的人机交互实现故障诊断、知识获取、维修管理，辅助学习，符合各层次诊断维修人员的需求。
The system realized diagnosis , knowledge acquisition, maintain management and learning assistant by friendly interface, which satisfied maintain personnel in different level.
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