4年 工业材料.; 工程塑料.绝缘材料; PMMA板材，棒材; PC板材，棒材; PS板材，棒材; F4板材，棒材; PC板材，棒材.; PVDF板材，棒材; PSU板材，棒材; PES板材，棒材; PTFE 板材，棒材; PPS板材，棒材; PEI板材，棒材; PEEK板材，棒材; PETP板材，棒材; PVC板材，棒材; UPE板材，棒材; PBT板材，棒材; POM-ESD板材; PA板材，棒材;