DIN 5684-3
DIN 5684-3 Round steel link chains - Fine tolerance hoist chains - Part 3: Grade T (Types T, DAT and DT)
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2013
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2013