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G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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FR489636D1917-04-121918-04-08
Device for indicating from a distance the height of water, or other liquid, in a boiler or other container
ExpiredFR489636A
(en)
Float with level indicator index, for steam boilers and other devices, allowing to know the level of any liquid at a height lower than the level itself