This company sells mobile phones in different models, so back-end data storage of this company's web service will contain a single table with two columns, model number and price.
该公司销售不同型号的移动电话，所以公司 Web 服务的后端数据存储库中将包含一个具有两列（ model number 和 price ）的表格。
It has two level contents, which are the data storage model of the single IC card and the uniform data store model of any IC card.
IC卡数据存储模型存在两个层次上的内容，首先是单张IC卡的数据存储模型，该模型可以以软件的方式描述同一种型号的多张IC卡；
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