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.P21 File Extension


File Type Express STEP Data Model File
File Format File
Common? No
File Description 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.
Program(s) that open p21 files Windows: LKSoft JSDAI for Eclipse

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/p21