... 3. Reply Email in 4 hours 4. SGS,RoHS,UL Network Refrigerator control systemCircuit board assembly fabrication:One-stop pcb assemblies ... ,FR-4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,3Board thickness0.2mm-3.5mm4Max panel size630mm*520mm5Min.drilled hole ... )7Min.line spaceing0.075mm(3mil)8Surface finish/treatmentHASL/HASL lead free,Chemical tin,Chemical Gold,Immersion gold Inmersion Silver/Gold,Osp ...