DIN EN ISO 4259:2006 Petroleum products - Determination and application of precision data in relation to methods of test (ISO 4259:2006); English version of DIN EN ISO 4259:2006-10
DIN 51639-1:2014 history
2014DIN 51639-1:2014-11 Testing of lubricants - Test methods - Part 1: Determination of total base number
2014DIN 51639-1:2014 Testing of lubricants - Test methods - Part 1: Determination of total base number