p21文件扩展名，p21文件怎么打开？

.p21

文件类型：Express STEP Data Model File

扩展名为.p21的文件是一个3D 图像文件。

文件说明：

3D model format used for three-dimensional product data representation and exchange; saved in an ACSII text format specified by ISO 10303-21; used primarily for industrial automation systems and integration purposes.

NOTE:

Express AIM (Application Integrated Model) and MIM (Modular Integrated Model) files must use the .STP extension..p21                                                                      

打开.p21文件

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来源：. p21文件