420层pcb板叠层顺序

CUI.M.CUI.M.CUI.M.CUI.M.CUI.M.CUI.M.CUI.M.CUI.M.0.020.0180.0180.0180.0180.0180.0180.0180.080.180.210.210.210.210.210.1250.020.0350...