GOST 7429-89

Oil - based drilling fluids. Field testing of fluids characteristics

System of national standards for quality of telecommunication services. Quality of services of local, long-distance and international telephone communication. Normative values for quality indices of telephone calls

High-voltage direct current transmission. Terms and definitions

Organic dyes. Testing method of dispersibility of pigments and lacquers for printing inks and polyvinylchloride

LED modules for general lighting. Safety specifications

Basic norms of interchangeability. Geometrical product specifications. Standard rates of taper and cone angles