DIN 5569-2
DIN 5569-2 Rail vehicles - Externally mounted wheelset-bearings with cylindrical roller bearings and labyrinth-gasket - Part 2: Component parts
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/1997
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/1997