Hollow Rectangular Enclosure with Three Openings

Create a single-body SolidWorks-style hollow rectangular enclosure in mm. Overall: **100 W × 100 D × 200 H**. Make a closed-bottom rectangular shell with: * Left/right walls: **20 mm** * Bottom thickness: **30 mm** * Top rim: **10 mm** Front face: cut a **60 W × 140 H** rectangular **through-opening**, centered horizontally, leaving **20 mm left/right** and **30 mm top/bottom**. Back face: create the **same 60 × 140 mm through-opening**, perfectly aligned with the front opening. Top face: cut a centered **80 × 80 mm through-opening**, leaving a **10 mm rim on all four sides**. Create **one continuous internal hollow cavity** connecting the front opening, back opening, and top opening. No internal partitions. Requirements: exact **100 × 100 × 200 mm** outer envelope; all faces planar and perpendicular; no fillets, chamfers, ribs, holes, draft, or decorative features. Keep the bottom completely closed and 30 mm thick. Feature order: Base 100×100 → extrude 200 → hollow cavity → front 60×140 through-cut → back 60×140 through-cut → top 80×80 through-cut.

Parameters

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