PCB , Multilayer pcb,6 layer pcb,mobile phone, PCB copy, PCB supplier, SMT PCB, electronic PCBA,Shenzhen factory KBT PCB Board Specification DescriptionPCB SpecificationMaterialFR-4/HTG150-180 FR ... ,SGS, UL CertificateFileProtel 99se/P-CAD/Autocad/Cam350 Mobile phone circuit PCB, Multilayer pcb