那位大侠用英语帮我对电路板外表的大概描述，谢谢

来源：百度知道 编辑：UC知道 时间：2024/05/22 02:22:47

Rise (maximum) 2-30-plate type FR-4, CEM-1, CEM-3, 22F, LF-1 (aluminum), LF-2 (aluminum), ceramic matrix, PTFE, ROGERS, FR - 5, high TG. Halogen-free, BT, Teflon plate of mixed-compression 4-12 maximum size 910 mm X 1300mm Dimension Tolerance ± 0.13mm thickness of 0.20 mm-7mm thickness tolerance (t ≥ 0.8 mm) ± 10% ± 8