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U-tube

   Also found in: Dictionary/thesaurus, Medical 0.02 sec.
manometer
An instrument for the measurement of pressure; a U-shaped glass tube partially filled with water or mercury, one side of which is connected to the source of pressure. The amount of displacement of the liquid is a measure of the magnitude of the pressure.


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To provide higher pressure rating the DR ratio should be decreased in the case of high rise buildings or when ground water tables are very low so that the benefit of external static pressures on the outside of the U-tube is not available.
 
 
 
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