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Tunnel kiln
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Method of and apparatus for repairing heated structures such as furnaces, retorts, or the like
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Tunnel kiln
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Heat treatment of materials for distilling, drying, or carbonizing them
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Tunnel kiln
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Furnace for heating hollow cylinders
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Process for the fixation of nitrogen
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Carbonizing fuel in vertical retorts
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Tunnel kiln
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Gas-fired pottery kiln
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Furnace for producing chemical changes
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Plant for gasifying fuel
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Gasification of coal or other carbonaceous material
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