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虚拟制造设备ＶＭＤ是ＭＭＳ规范中最重要的一类对象，是实现ＭＭＳ服务的基础。本文介绍了ＶＭＤ对象的抽象描述，讨论了ＶＭＤ和实际制造设备ＲＭＤ之间的映射关系及其实现，并以时序逻辑技术描述了这种映射交互活动的特性。
Virtual Manufacturing Equipment VMD is the most important class of objects in the MMS specification and the basis for implementing MMS services. This article introduces the abstract description of VMD objects, discusses the mapping relationship between VMD and actual manufacturing equipment RMD and its implementation, and describes the characteristics of this mapping interaction activity by using temporal logic technology.