Testing of lubricants; determination of ageing characteristics of lubricating oils; increase in Conradson carbon residue after ageing by passing air through the lubricating oil— 5 стр.
Testing of lubricants; determination of ageing characteristics of lubricating oils, increase of the Conradson carbon residue after ageing by passing air through the lubricating oil— 4 стр.
German standard methods for the examination of water, waste water and sludge; physical and physicochemical parameters (group C); determination of colour (C 1)— 6 стр.