This standard specifies two methods for determining the static transverse bending modulus of inorganic glass and
GOST 9900-1985 history
2013GOST 9900-2013 Glass and glass products. Methods for determination of mechanical properties. Determination of elasticity modulus at cross static bending
1985GOST 9900-1985 Inorganic glass and glasscrystal materials. Methods for the determination of elastic module at cross static bending