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A code that uses one or more different colors of bars in combination with black bars and white spaces, to increase the density of binary coding of data printed on merchandise tags or directly on products for inventory control and other purposes.

Related Terms

ADJUSTABLE DIFFERENTIAL

A means of changing the difference between the control cut-in and cut-out points.

COMPOUND

(1) chemically speaking, a distinct substance formed by the combination of two or more elements in definite proportions by weight and possessing physical and chemical properties different from those of the combining elements. (2) in petroleum processing, generally connotes fatty oils and similar materials foreign to petroleum added to lubricants to impart special properties.

ACTION

Refers to the action of a controller. It defines what is done to regulate the final control element to effect control.

SHED MODE

A method of demand control that reduces kW demand through shedding and restoring loads.

COMBI

Vessel designed for a combination of passengers, and different types of cargo.

HARMONIC MOTION

The projection of circular motion on a diameter of the circle of such motion. Simple harmonic motion is produced if the circular motion is of constant speed. The combination of two or more simple harmonic motions results in compound harmonic motion.

CATALYST

A substance which speeds a chemical action without undergoing a chemical change itself during the process. Now used in catalytic converters to control amount of unburned hydrocarbons and CO in automobile exhaust.

BULK MODULUS (OF ELASTICITY)

A ratio of normal stress to a change in volume. A term used in determining the compressibility of a fluid. Data for petroleum products can be found in the International Critical Tables.

FLOWMETER

A device which indicates either flow rate, total flow, or a combination of both.

AUTOMATIC FROST CONTROL

Control which automatically cycles refrigerating system to remove frost formation on evaporator.
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