黄色a一片_欧美熟妇BBBBBB搡BBBB_エロンピースエロじ天堂_青青草视频_韩国肉漫免费观看_无码国产伦一区二区三区视频_无毒a网_亚洲伊人久久综合成人_日本乱妇18日本乱妇18p_又黄又爽又猛1000部A片_国内少妇高清露脸精品视频_欧美在线视频一区_成人性生交大片免费看中国A片_全球热恋_久久精品中文闷骚内射_国产成人AV在线播放影院_最近最新中文字幕MV高清在线_日本的AAA高清片_91av在线免费观看_94色94色永久网站

Graphene viscose composite fiber is composed of single-layer graphene oxide and viscose spinning solution. The unique dispersion process and spinning process design ensure that graphene is evenly dispersed in the viscose fiber. This new composite fiber has many functions such as far-infrared emission, anti-bacterial and anti mite, anti ultraviolet, negative ion emission, etc. it has been certified by a number of domestic and foreign authoritative testing institutions to protect health.