pcb special-shaped circuit large board can do 600mm proofing batch expedited delivery

processing custom: yes item no: 293 brand name: lingbang model: 293 mechanical rigidity: rigidity number of layers: double-sided base material: copper insulation material: organic resin insulation layer thickness: conventional board flame retardant properties :vo board processing technology: electrolytic foil reinforcement material: glass fiber cloth base.syi