Projekta Nr.ISO 1689:1976
Nosaukums<p>The document specifies the formula for the calculation. In this ratio, only sodium oxide and potassium oxide combined in the form of silicates is considered. Replaces ISO Recommendation R 1689-1970.</p>
Reģistrācijas numurs (WIID)6305
Darbības sfēra<p>The document specifies the formula for the calculation. In this ratio, only sodium oxide and potassium oxide combined in the form of silicates is considered. Replaces ISO Recommendation R 1689-1970.</p>
StatussStandarts spēkā
ICS grupa71.060.50