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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
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FR399344D1908-12-221908-12-22
Apparatus for accelerating the circulation of boiling water in boilers, pipes, radiators, in heating systems
ExpiredFR399344A
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Method and devices for measuring calories, more particularly the quantities of heat emitted by radiators, hot water or steam taps and the like in central heating installations
Method and devices for measuring calories, more particularly the quantities of heat emitted by radiators, hot water or steam taps and the like in central heating installations