eangsopheann: in this video of ball valve accessories in Autodesk AutoCAD 3D by used command circle (C), command pline (PL), command extend (EX), command trim (TR), command boundary (BO), command extrude (EXT), command subtract (SU), command chamfer (CHA), command helix, command array (AR), command move (M), command erase (E), command union (UN), command intersect (IN), polygon (POL), ...
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