供求信息

PP熔喷布原料

PP(聚丙烯) S2040/上海赛科/无妨布专业料

PVC医疗护镜原料

口罩鼻梁条

口罩 鼻梁条-批发

kn95口罩是什么材料制作的?

制造KN95口罩材料是什么?

口罩鼻梁骨材料/鼻梁条环保材料

塑料制品上写着 pp是什么意思?

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