Calcination: The powdered gypsum is heated to remove h2o molecules, producing different kinds of plaster dependant upon the temperature and length of heating. Map of gypsum deposits in northern Ohio, black squares suggest The placement of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in numerous types of applications: When gypsu

बाहरी साइटों का लिंक देने की हमारी नीति के बारे में पढ़ें. 'आदिवासियों के महाकुंभ' का आगाज; श्रद्धालुओं का लगेगा तांता! जानें क्या है ख