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CS422987A1
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Connection of air heater and burners in steam or hot water boiler
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CS895486A1
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Steam preheather for flue and fire-tube boiler
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CS463886A1
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Device for the burning of air pollution
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CS886185A1
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Hollow circular stiffener for straight flue
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CS418185A1
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Annular insertion piece from refractory material for flue
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CS218687B1
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Case for protection of the heat exchanger pipe ends
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CS219506B1
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Combustion device for the lump minor value fuels
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CS215298B1
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Circular grate
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CS198918B1
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Shaped fire tube insert
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CS208242B1
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Turbulent burner for combusting especially solid fuels of fossil origin
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CS188440B1
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Air whirler for oil burners
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CS180418B1
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Fusible cut-out and method of its production
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