久久精品网站免费观看调教,国产系列视频二区,日韩美女拍拍免费视频网站,天天干夜夜爽天天操夜夜爽视频,九九热线精品视频6一,神马视频我不卡,神马电影天堂

News

News

Donghai Silica Powder Organized and Held Technical Communication Session about U

2013.07.28

Donghai Silica Powder organized and held the technical communication session about Usage of CCL filler. The elites from a total of 16 domestic enterprises gathered in the Shijiyuan International Hotel to join the feast. They gave counsel suggestions for the R&D and application of filler technology and made contribution to the development of industry technology. General Manager Li Xiaodong from Donghai Silica Powder joined the session and gave the welcoming speech.