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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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FR3359D1904-01-051904-06-15Dispositif automatique de mise en marche et d'arret d'appareils élévatoires d'eau ou d'autres liquides ou fluides
ExpiredFR3359E
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