Third, through the study on project database, use the data stock of logic level to store the figure restraint and management of the water conservancy drawing-library.
第三,通过对工程数据库的研究,运用逻辑层次数据库存储图形约束及水工图库的管理。
Third, through the study on project database, use the data stock of logic level to store the figure restraint and management of the water conservancy drawing-library.
第三,通过对工程数据库的研究,运用逻辑层次数据库存储图形约束及水工图库的管理。
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