Wuxi Changrong has provided Screw Conveyor Design Calculation for many famous companies both at home and abroad. Such as Rockwool in Denmark, SaintGobain Group, Lanxess Shanghai,BASF Shanghai,BASF Nanjing,Degussa,Ingevity performance Material Zhuhai Company,Invista Shanghai,Dupont, Owenscorning, Mitsubishi Heavy, Japan SUMITOMO,Japan Kurita, etc.