成人网在线观看,日中文字幕,91麻豆国产精品,国产精品com,www.毛片com,免看一级一片,欧美一级片网址

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..