pcb fr-4 double panel screen printing board pcb batch proofing shenzhen factory direct sales

processing custom: yes item no: 058 brand: leabon model: 058 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