... , computers, communication apparatus as well as other high grade electronic instruments.2. FR-1copper clad laminated sheet/CCL consist of ... widely used for computers, telephones, Hi-Fi acoustic devices, electronic toys and etc. 4. CEM-1 copper clad laminate consist of ... used for computers, VCD sets, Hi-Fi acoustic devices and other high grade electronic appliances. Normal Thickness: 1.0mm, 1.2mm, ...