Chapter two presents the basic principle and method of product information modeling based on symbol.
第二章提出了基于符号的产品信息建模基本原理和方法。
The name and basic information of the applicant, and the product to be adjusted;
申请人名称及其简况，申请调整的产品；
The name and basic information of the applicant, and the product to be adjusted;
申请人名称及其简况，申请调整的产品；
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