介绍了全电子式智能卡预付费电度表的工作原理、结构及技术特性，通过实例分析了使用它所带来的经济效益。
This text introduce the working principle, structure and technicality features of one-phase full -electronic pre-payment brain card meter, analysised its economic benefits through use it.
数字多用表的技术特性决定了其不可能测量接近理论极限的信号，如图1 - 3所示。
Given these DMM characteristics, it's not possible to use a DMM to measure signals at levels close to theoretical measurement limits, as shown in Figure 1-3.
分析了变型技术在快速产品设计中的作用，以实例说明了对如何进行零件变型定义、构建变型零件的事物特性表。
The role of variety design on rapid product design and presents how to define the guided bolt in variety design and build affair feature list of variety part are presented.
第三章，提出了基于事物特性表的零件族有限元模型实现快速变型设计的关键技术。
In Chapter Three, the key technology of realizing the rapid variant design of part family's FEM model based on SML is given.
基于面向对象技术，描述了事物特性表的特性、约束集和关联图。
SML's properties, constraint set and dependency graph were mainly described.
基于面向对象技术，描述了事物特性表的特性、约束集和关联图。
SML's properties, constraint set and dependency graph were mainly described.
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