lubricants Review A Practical Approach to Gear Design and Lubrication: A Review Dario Croccolo 1 , Massimiliano De Agostinis 1, Giorgio Olmi 1 and Nicolò Vincenzi 2,* 1 Department of Industrial Engineering (DIN), University of Bologna, Viale del Risorgimento, 2, 40136 Bologna, Italy; ...