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0.5mm bare copper, 2.25mm soldermask opening (Level C Circular Fiducial, 1mm bare copper, 3mm soldermask opening (Level A Circular Fiducial, 0.75mm bare copper, 3mm soldermask opening (Level B Circular Fiducial, 1mm bare copper, 1.5mm soldermask opening Circular Fiducial.

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