日本高清不卡一区二区三区,欧美一区二区三区高清视频,久久综合网丁香五月,国产一区二区精品在线,久久精品人人澡夜夜澡,精品一区二区免费视频蜜桃网,欧美在线观看一区二区三区,日产国产高清一区二区三区

Chinese | English

Projects

 LIHENG2 Spinning

Successfully developed to 22.2dtex / 24f, represented by a series of porous polyamide 6  fully drawn fiber products, the overall technology has reached the international advanced level.