³Ô¹Ïtv / ENGINEERING NOTEWorked reference: Multilayer Metal Core PCB DesignRadial gap = (core opening − bore − 2 × plating)/2010.6 mm bore; 25 µm plating021.2 mm core opening: 0.275 mm03Subtract registration allowanceIllustrative inputs or review logic; no automaticapproval.Conceptual drawing. Not to scale; not manufacturing or compliance evidence.