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All authors
Text Ergin Sarp Zencirci1, Okay Altun1, Ahmet Hakan Benzer1, Levent Onat2, Osman Nemli2          1Hacettepe University, Mining Engineering Department, Beytepe, Ankara/Turkey              2Bursa Çimento Fabrikası A.Ş., Kestel, Bursa/Turkey