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FLY AND BOTTOM OIL-SHALE ASHES AS BINDERS FOR CONCRETE-LIKE MATERIALSPRODUCED FROM COAL-ASHES OR SAND, FOR GENERAL USE IN THE BULDING INDUSTRY
FLY AND BOTTOM OIL-SHALE ASHES AS BINDERS FOR CONCRETE-LIKE MATERIALSPRODUCED FROM COAL-ASHES OR SAND, FOR GENERAL USE IN THE BULDING INDUSTRY