The DXF file format is one of the widely used graphics exchange formats in the graphics application development, and the lots of CAD software have supported it.
DXF文件格式是图形开发中最常用的图形交换格式之一，众多CAD软件都支持它。
Recently, many software companies developed and manufactured various kind of collaborative design software of CAD in domestic, along with the development and application of CAD design software.
近年来，随着CAD设计软件的开发与应用，国内有许多软件公司开发、研制了各种CAD协同设计软件。
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