国产乱来乱子视频,内射在线Chinese,欧美成人精品A8198V无码 ,色综合天天综合网国产成人网

Navigation/on

Navigation/off

中文/EN

Media Focus

Media Focus

Synthetic Fiber - Nylon

"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.

Service hotline
Please leave your email

Technical support: lanyun