PEI共聚物树脂工程塑料原料PEI颗粒PEI Copolymers Resin Engineering Plastic Raw Material PEI Granules PEI共聚物树脂工程塑料原材料PEI颗粒。填充30%的玻璃纤维;2.阻燃剂UL94-V0;3.耐温至340C;4.有竞争力的价格