Usually, we can drag and drop two things. Data or some graphical objects.
一般来说，我们可以拖放两件事情，数据或依稀图形对象。
Geological symbols generally have the specific graphical features and geological significances and can be used to present some concrete or abstract objects in geological drawing.
地质符号一般均有其特定的图形特征和表示意义，用以表达地质制图中所涉及的具体或抽象的地质对象。
Geological symbols generally have the specific graphical features and geological significances and can be used to present some concrete or abstract objects in geological drawing.
地质符号一般均有其特定的图形特征和表示意义，用以表达地质制图中所涉及的具体或抽象的地质对象。
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