亚洲欧美精品AAAAAA片,成人黄色在线视频,h成年动漫在线看网站,国产精品免费视频拍拍拍

"Nylon", also known as "Capron" and "Chinlon", its chemical name is polyamide fiber. Everyone is no stranger to nylon, because the nylon products can be found everywhere in daily life. However, few people know its history. Nylon is the first synthetic fiber developed in the world.