Models Reducer cylindrical -simple 16 154 2 Weighing module by T.Pachcinski 3 21 2 Liebherr 984 Excavator (Autodesk Inventor ) 33 553 0 Excavator bucket 14 290 1 Superleggera III - OZ Racing wheel 22 156 1 fork 7 380 0 Education University of Technology in Poznan Eng.