说明：  浏览/编辑CAD图形的控件,支持打开，浏览所有版本CAD文件，并自动识别CAD文件版本。-View/edit CAD graphic controls, support for open, browse all versions of CAD files and automatic recognition of CAD file versions.
(-View/edit CAD graphic controls, support for open, browse all versions of CAD files and automatic recognition of CAD file versions.)