pcb
pcb hadana thava kram thiyenava. aththatama mekath eka kramayak thamayi. sarala podi podi vedavalata hariyana. eeth vadaa complicated ekak karanavanam screen printing valin karana eka tamayi honda.
ferric cloride ganna puluvan colombo gihin bangsole ( bangasaala viidiya) 2 hari 1 hari...