STEP File - What is an .step file and how do I open it?
View, Share and Collaborate | STP and STEP File Viewer
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STP Viewer
Viewer Basic | IDA-STEP
What is STP file? How to view an STP/STEP file in Windows 11/10?
3D Viewer – ABViewer. View, print and convert STEP, STP, STL, IGES, 3DS, SLDPRT, X_T, X_B, DWG and other 3D file formats!