Specifies a long pointer to a DRAWITEMSTRUCT data structure that contains information about the item to be drawn and the type of drawing required.

指定了指向DRAWITEMSTRUCT数据结构的长指针，其中包含有关要画出的项和要求的绘图类型的信息。

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Fundation about basic data processing, discrimination models and logging diagrams, the principle and the method of drawing outputting. It is a structure of information processing system.

建立基础数据处理、判别模型和录井图、成果图输出的原理和方法，从而形成了一套资料处理系统。

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The structure of the interior database system is given. And the features of interior data is analyzed such as drawing data, standard data and so on.

文中给出了内部数据库系统的组织结构，分析了内部工程数据如图形数据、标准数据的特点。

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