... Copper Clad Laminate Sheet FR4 Copper Clad Laminate,Pcb Base Board,Laminated Board,Printed Board, CCL FR4, FR1,XPC, CEM-1 etc Copper Clad Laminate Sheet FR4Copper Clad Laminated Sheet (CCL ... used for computers, telephones, Hi-Fi acoustic devices, electronic toys and etc. 4. CEM-1 copper clad laminate consist ... lower bow and twist: It is widely used for computers, VCD sets, Hi-Fi acoustic devices and ...