专门水文地质学
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special hydrogeology survey 专门水文地质勘察
The design of form and legend is the basic and necessary work to map-making for every special theme, also the key of standardization and automation for karst hydrogeology maps.
图式图例的设计是每项专题制图工作必不可少的基础工作,也为制图工作实现标准化、自动化的重要环节。
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