成人国产综合,日韩在线播放中文字幕,亚洲电影天堂网,欧美国产精品一区二区免费,庄温妮,日韩一级电影在线观看,美女扒开内裤无遮挡无遮挡

In the R&D center, we equip with all facilities necessary for the research and product development, these equipment include: various chemical, optical and physical measuring instrument, two roll mills, brabenders, lab extruders, congo red test machine, all sorts of mixers, ovens, all sorts of instruments for test of raw material property and performance etc..