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Method of developing oil fields
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House-heating system
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Development of oil fields
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Method of developing oil fields
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Method of developing oil fields
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Method of developing oil fields
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Method and apparatus for obtaining indications of earth formations
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Method of developing oil fields
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Method and apparatus for distilling solid carbonaceous material
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House heating system
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Production of oil from oil sands in the earth
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Apparatus for generating steam
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Process for making producer gas
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Method of and apparatus for refrigeration
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Coal-carbonizing furnace
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Process of producing combustible gas and for carbonizing coal
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Process of distilling oil
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Process of making alloys.
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Method of treating liquids to remove dissolved salts.
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CA178178A
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Gas purification
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