Here you will find one or more explanations in English for the word Hydrometrograph.
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Hydrometrograph
Hydrometrograph Hy`dro*met"ro*graph, n. [Hydro-, 1 + Gr. ?
measure + -graph.]
An instrument for determining and recording the quantity of
water discharged from a pipe, orifice, etc., in a given time.
Meaning of Hydrometrograph from wikipedia
