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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
F22D7/00—Auxiliary devices for promoting water circulation
F22D7/06—Rotary devices, e.g. propellers
F22D7/08—Arrangements of pumps, e.g. outside the boilers
F22D7/10—Arrangements of pumps, e.g. outside the boilers within the boilers
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FR507492A1919-02-081919-12-16Perfectionnements aux dispositifs pour activer la circulation, de l'eau dans les chaudières à tubes d'eau
ExpiredFR507492A
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