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Priority to NL3280ApriorityCriticalpatent/NL895C/nl
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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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Engineering & Computer Science
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NL3280A1913-09-081913-09-08Verbetering aan stoomketels
NL895C
(nl)