It is the classification for the Quaternary stratigraphies of Hebei Plain study to build a platform for the aquifer structure model of the North China Plain .
该文是在以往研究基础上对河北平原第四纪地层划分的一次探讨，其成果为建立华北平原含水层结构模型搭建了平台。
This model has a flexible coding structure and its coding methods can be used to solve all kinds of problems in information classification and coding.
采用此模型的编码方法可解决各类信息的分类编码编制问题。
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