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Device for adding solid fuels to a gasifier mixture
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Method of producing plastic and moldable composition
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Method of producing artificial resin
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Improvements in the production of artificial resins
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Process of making shaped and hardened articles from products of phenol and formaldehyde and the like
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Process for the manufacture of resinous products of condensation from phenol and formaldehyde
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Process for the manufacture of resinous products of condensation from phenol and formaldehyde
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A process for the manufacture of resinous phenol formaldehyde condensation products
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