the moving part being in rotation

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    Kiln

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    • John W. Morrison
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    3918691

    • Patent number 3,918,691
    • Issue date Nov 11, 1975
    • C21 - METALLURGY OF IRON
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    3756582

    • Patent number 3,756,582
    • Issue date Sep 4, 1973
    • C21 - METALLURGY OF IRON

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