ISO 1689 : 1976(R2019)現行
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
專家解讀視頻
Gives the formula for the calculation of the ratio SiO2/Na2O or SiO2/K2O for sodium and potassium silicates for industrial use.
UNE 55624 : 1982 - Identical
NBN T 03 234 : 1980 - Identical
PN ISO 1689 : 2000 - Identical
PN ISO 1689 : 2000 - Identical
NBN T 03 234 : 1980 - Identical
UNE 55624 : 1982 - Identical
NBN EN 1209 : 2004 - Identical
