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Unbalance

Unbalance is the term used for a mass distribution in rotating bodies that is not rotationally symmetric.

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Under-filing

Under-filing is the retrospective machining of impeller vanes on centrifugal pumps with low specific ...

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Under-filing of impellers

Under-filing represents a special form of impeller trimming.

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Unit

A unit in conjunction with a numerical value describes the quantitative value of a physical dimension.

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Unstable H/Q curve

The H/Q curve (see Characteristic curve) of a centrifugal pump is called unstable in a given flow ...

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Useful power output

A term which is also used to describe the pump power output.

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User interface

A user interface is also known as a Man-Machine Interface (MMI) and is the part of a system used by a ...

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U-tube

The U-tube is a simple U-shaped pressure gauge used in metrology applications (see Pressure ...

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