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F22B37/00—Component parts or details of steam boilers
F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
F22B37/565—Blow-down control, e.g. for ascertaining proper duration of boiler blow-down
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FR704717D1929-12-231930-10-28Installation pour la surveillance de l'évacuation des boues de chaudières à vapeur, ou autres opérations analogues
ExpiredFR704717A
(fr)