Degrees of protection of enclosures; protection of persons against contact with live parts, protection of equipment against ingress of solid foreign bodies and of water, small transformers till 16 kVA— 3 стр.
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; Conradson carbon residue after ageing by passing air through the lubricating oil in the presence of iron(III)oxide— 3 стр.
German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determination of the inhibitory effect of waste water on the oxygen consumption of Pseudomonas putida (L 27)— 16 стр.
