ISO 1689:1976现行
Sodium and potassium silicates for industrial use - Calculation of the ratio : silicon dioxide/sodium oxide or silicon dioxide/potassium oxide
出版：International Organization for Standardization
专家解读视频
Gives the formula for the calculation of the ratio SiO2/Na2O orSiO2/K2O for sodium and potassium silicates for industrial use.
SS ISO 1689 Ed. 1 (1993) - Identical
UNE 55624:1982 (R1999) - Identical
PN ISO 1689:2000 - Identical
NBN T 03 234:1980 - Identical
NBN EN 1209:2004 - Identical
KS M ISO 1689:2007 - Identical
KS M 1415:2002 - Modified
