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F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
F22D11/00—Feed-water supply not provided for in other main groups
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FR603315D1925-03-121925-08-13Perfectionnements aux appareils destinés à servir en combinaison avec l'alimentation d'eau de chaudières à vapeur
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