GOST 8820-1969 Grinding stone exit grooves. Shape and sizes
GOST 8908-1981 Basic norms of interchangeability. Standart angles and angle telerances*, 1981-12-22 Update
GOST 9.014-1978 Unified system of corrosion and ageing protection. Temporary corrosion protection of products. General requirements*, 1978-12-22 Update
GOST 18438-1973 history
1973GOST 18438-1973 Notched straight-side center arbors. Design and dimensions