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A pattern of powder flow occurring in hoppers that is characterized by a central core of flowing powder with the powder near the hopper flo }core gripper walls remaining stationary. See split-ring core lifter.



Related Terms

DIFFERENTIAL-PRODUCING PRIMARY DEVICE

An instrument that modifies the flow pattern of a fluid passing through a pipe, duct, or open channel, and thereby produces a difference in pressure between two points, which can then be measured to determine the rate of flow.

OBLIQUE VALVE

A type of globe valve having an inclined orifice that serves to reduce the disruption of the flow pattern of the working fluid.

MASS FLOW

A pattern of powder flow occurring in hoppers that is characterized by the powder flowing at every point, including points adjacent to the hopper wall.

CYCLOGRAPH

An electronic instrument that produces on a cathode-ray screen a pattern which changes in shape according to core hardness, carbon content, case depth, and other metallurgical properties of a test sample of steel inserted in a sensing coil.

ELECTROMAGNET

A temporary magnet made of a ferromagnetic core wound with insulated wire through which is passed an electric current. The current flow through the windings causes a magnetic field to build that will attract magnetic material.

PHLEGER CORER

A device for obtaining ocean bottom cores up to about 4 feet (1.2 meters) in length; consists of an upper tube, main body weight, and tailfin assembly with a check valve that prevents the flow of water into the upper section and a consequent washing out of the core sample while hoisting the corer.

ESTABLISHED DIRECTION OF TRAFFIC FLOW

A traffic flow pattern indicating the directional movement of traffic as established within a traffic separation scheme.

RECOMMENDED DIRECTION OF TRAFFIC FLOW

A traffic flow pattern indicating a recommended directional movement of traffic in a routing system within which it is impractical or unnecessary to adopt an established direction of traffic flow.

ELECTRON VACUUM GAGE

An instrument used to measure vacuum by the ionization effect that an electron flow (from an incandescent filament to a charged grid) has on gas molecules.

INTERCEPTING SEWER

A sewer that receives flow from transverse sewers and conducts the water to a treatment plant or disposal point.

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