2-kihiline F4MB PCB 2-kihiline R4350B PCB 4-kihiline R4350B PCB 4-kihilised rogerid + FR4 PCB 4-kihiline rogers4003 PCB 6 kihiline FR4+Rogersi PCB 6-kihiline rogers4003 PCB 10 kihiline R4003C PCB