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/30 <br />/25 <br />/20 <br />J <br />m <br />J <br />> //5 <br />2 <br />O <br />O //O <br />/05 <br />/00 <br />MOISTURE <br />STANDARD PROCTOR CURVE <br />SAMPLE N0.1 <br />MEDIUM-FINE GRAINED SANDSTONE <br />KERR COAL COMPANY <br />