1 Prezentul standard stabile?te condi?iile generale de calitate ale nisipurilor cuar?oase preparate, destinate fabric?rii sticlei, geamurilor ?i ceramicii fine.
2 Dup? con?inutul de trioxid de fier, nisipurile cuar?oase preparate se clasifi
STAS 9203-1976 history
1976STAS 9203-1976 QUARTZ SAND FOR THE MANUFACTURE OF GLASS, WINDOW-GLASSES AND FINE CERAMICS General technical requirements for quality