久久影院午夜理论片无码_少妇人妻在线视频_成人av无码一区二区三区_波兰女人毛茸茸

NBR

NBR butadiene rubber

產品詳情

Nitrile rubber is made from butadiene and acrylonitrile through emulsion polymerization. It is mainly used to make oil-resistant rubber products. Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. . Its disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties and slightly lower elasticity. Nitrile rubber is mainly used to make oil-resistant rubber products.

������������ϵ��һ������,����AV�ۺ�ɫ����������С˵

久久影院午夜理论片无码_少妇人妻在线视频_成人av无码一区二区三区_波兰女人毛茸茸