2015DIN 51350-3:2015-03 Testing of lubricants - Testing in the four-ball tester - Part 3: Determination of wearing characteristics of liquid lubricants
2015DIN 51350-3:2015 Testing of lubricants - Testing in the four-ball tester - Part 3: Determination of wearing characteristics of liquid lubricants
2010DIN 51350-3:2010 Testing of lubricants - Testing in the four-ball tester - Part 3: Determination of wearing characteristics of liquid lubricants
1977DIN 51350-3:1977 Testing of lubricants; testing in the Shell four-ball tester, determination of wearing caracteristics of liquid