标签：
AcDbBlockTable
AcDbLayerTable
AcDbTextStyleTable
AcDbLinetypeTable
AcDbViewTable
AcDbUCSTable
AcDbViewportTable
AcDbRegAppTable
AcDbDimStyleTable
AcDbSymbolTable of AcDbDatabase
原文地址：http://www.cnblogs.com/Yself/p/4769018.html
