DIN 51834-4 E:2019-02 Testing of lubricants - Tribological test in the translatory oscillation apparatus - Part 4: Determination of friction and wear data for lubricating oils with the cylindrical roller-disk geometry
1970DIN 51834-4 E:2019-02 Testing of lubricants - Tribological test in the translatory oscillation apparatus - Part 4: Determination of friction and wear data for lubricating oils with the cylindrical roller-disk geometry
2012DIN 51834-4:2012 Testing of lubricants - Tribological test in the translatory oscillation apparatus - Part 4: Determination of friction and wear data for lubricating oils with the cylindrical roller-disk geometry