伊人国产女人久久|精华区一区二网站|国产第一视频91|久草在费在线观看|影音先锋午夜福利|艺校国模一 色欲|国产欧美一区三区|国产不卡刺激久久|免费hs网站国产|亚洲一区二91.

Chemical Advanced Materials

Dyestuff Information Centre

The centre mainly carries on collection, organization and research of the dyestuffs industry information. It's in charge of the Society of Chinese Dyes and Colorists (CIESC) and the National Dyestuff Industry Information Centre. Dyestuffs and Coloration, dye information materials and manuals are edited and published by the centre.