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DE348688C
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Device for the treatment of finely divided substances, especially for the distillation of sawdust
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US1420944A
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Apparatus for treating substances in a finely-divided condition
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GB162769A
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Improved apparatus for carbonizing sawdust and other finely-divided material and for treating gases and vapours with finely divided substances
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GB141417A
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Improvements relating to the destructive distillation of wood, woody fibre and similar carbonaceous substances
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GB139237A
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Improvements relating to scrubbers, saturators, and similar apparatus
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