Models Reducer cylindrical -simple 16 142 2 Weighing module by T.Pachcinski 3 16 2 Liebherr 984 Excavator (Autodesk Inventor ) 30 504 0 Excavator bucket 13 270 0 Superleggera III - OZ Racing wheel 22 140 1 fork 7 361 0 Education University of Technology in Poznan Eng.