https://www.alibre.com/Free/CAD-Software
赞助Alibre 3D CAD Software Is Uncluttered & Easy To Use. Friendly User Support Available. Powerful Tools. Low Learning Curve. Feature Rich With 20 Years Of Development. Learn More!
Expert Customer Support · Tons of addons · Sheet Metal + Rendering · Optional Maintenance
Amenities: Sheet Metal Design, Assembly Design, Product Family Design