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F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
F24H1/18—Water-storage heaters
F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
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FR1030740D1949-12-301950-12-29Appareil de chauffage pour les liquides et en particulier pour l'eau, dans des canalisations sous pression
ExpiredFR1030740A
(fr)
Appareil pour l'injection dans le sol d'eau d'arrosage, de matières fertilisantes, de produits chimiques toxiques et d'autres matières sous forme de liquides et de gaz