Where and when the products are used?
It depends which software's are used for design for example
1.AutoCAD uses .dwg format
2.Pro-E uses .prt format and
3. Catia uses .CATPART or .CATDRAWING format
It's depand on your software for pro-e it's 'prt' and for autocad it's 'dwg'
Various types of formats depends upon which design software is used. If AutoCAD is used, dwg format is used.
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