GOST 8820-1969 Grinding stone exit grooves. Shape and sizes
GOST 9.073-1977 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. Types, thickness rows and designations
GOST 21200-1975 history
1975GOST 21200-1975 Support holders for tangential cutters of turret lathes. Design and dimensions