1990GOST 25412-1990 Hard metal brazed tips, type 32. Design and dimensions
1985GOST 26412-1985 Shielding materials for radiochemical works and nuclear power plants. Method for determination of isolating properties in respect to beta-radionuclide contamination
1981GOST 2.412-1981 Unified system for design documentation. Rules for making drawings and diagrams of optical products
1979GOST 23412-1979 Waste water drain sanitary accessories. Types and principal dimensions
1975GOST 20412-1975 Oscillator, modulator and regulation tube. Terms and definitions