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MINING-MACHINE CUTTING STRUCTURE
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03/27/1973
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SULFUR TRIOXIDE VAPOR FOR DUST CONDITIONING
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10/28/1975
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05469185
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07/15/1975
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08/16/1977
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08/09/1977
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12/16/1980
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12/09/1980
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05/13/1980
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08/10/1977
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04/19/1983
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12/19/1977
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04/14/1981
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02/21/1984
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12/23/1980
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03/31/1981
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12/18/1978
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06/02/1981
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01/18/1979
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10/21/1980
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02/15/1979
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04/14/1981
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02/28/1979
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04/14/1981
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02/28/1979
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LIME SLAKING APPARATUS
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02/17/1981
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03/01/1979
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08/26/1980
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04/04/1979
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FILTER BAG RETAINING SYSTEM WITH REMOVABLE THIMBLE EXTENSION
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01/20/1981
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05/21/1979
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10/26/1982
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06/08/1979
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11/11/1980
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07/13/1979
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09/01/1981
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09/12/1979
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07/13/1982
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10/01/1979
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MONORAIL SUSPENDED CONVEYOR SYSTEM
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08/11/1981
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10/05/1979
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12/01/1981
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12/26/1979
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02/02/1982
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01/18/1980
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EMERGENCY BRAKE SYSTEM EMPLOYING SHUTTLE VALVE
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01/12/1982
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06124181
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02/25/1980
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FILTER BAG ATTACHMENT
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09/06/1983
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06/06/1980
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ELECTRICAL SWTICH
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08/03/1982
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06188969
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09/19/1980
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CUTTER BIT HOLDER
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12/14/1982
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06196513
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10/14/1980
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CONTINUOUS MINING MACHINE
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10/11/1983
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06204784
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11/07/1980
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CONVEYOR FOR REMOVAL OF BED DRAIN MATERIAL FROM A COAL-BURNING FLUIDISED BED COMBUSTOR
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