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<br />tr <br />w <br />Q <br />3 <br />0 <br />F <br />I <br />w <br />0 <br />0 <br />-2 <br />-4 <br />-6 <br />-8 <br />-10 <br />-72 <br />-14 <br />-16 <br />-18 <br />-20 <br />-22 <br />-24 <br />-26 <br />-28 <br />-30 <br />BLUE RIBBON COAL COMPANY <br />PIEZOMEfER P-1 <br />6/85 12/85 6/86 12/86 6/87 <br />DATE <br />12/87 6/88 12/88 6/89 <br />