设备类型独立性：代理体系结构必须能够支持广泛的具有不同能力的硬件和软件组件。
Device type independence: The surrogate architecture must be able to support a wide range of hardware and software components with different capabilities.
特别是，ERP采用的基础技术将同时给用户软件和硬件两方面的独立性从而更加容易升级。
In addition, the base technology used in ERP will give users software and hardware independence as well as an easy upgrade path.
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