| A door equipped with a power-operated mechanism and controls that open and close the door automatically upon receipt of a momentary actuating signal; the switch that begins the automatic cycle may be a photoelectric device, floor mat, or manual switch.
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| In a concrete batching plant, a system that automatically maintains the temperature of aggregates discharged from the dryer within a preset range.
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| Pressure-controlled valve which rces high-pressure liquid refrigerant to low-pressure liquid refrigerant.
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| Control which automatically cycles refrigerating system to remove frost formation on evaporator.
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| Refrigerating mechanism designed to automatically produce ice cubes in quantity.
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| In an asphaltic concrete plant, a system in which proportions of the aggregate and asphalt fractions are controlled by means of gates or valves which are opened and closed by means of self- acting mechanical or electronic machinery without any intermediate manual control.
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| See Surface Skimmer.
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| 1. A device that works by itself without human intervention, usually actuated by some impersonal influence, as for example, a change in current strength, pressure, temperature, or mechanical configuration. 2. Done spontaneously without conscious intention, see Non-Automatic.
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| The use of automatic equipment to save mental and manual labor.
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| A piece of mechanism with concealed motive power; a Robot.
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| Implements or apparatus that pertain to the repair and care of the automobile.
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| 1. An apparatus for hoisting automobiles in order to have access to the carriage underneath. 2. An elevator used to move automobiles up and down in a parking structure.
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| Surface upon which a body is placed for examination after death; a specified item installed in hospitals, laboratories, and police crime labs.
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| Transformer in which both primary and secondary coils have turns in common; step-up or step-down of voltage is accomplished by taps on common winding.
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| The extra heat provided by a conventional heating system for periods of cloudiness or intense cold, when a solar heating system is insufficient.
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| In a concrete shell structure, ribs or edge beams which serve to strengthen, stiffen or support the shell; usually, auxiliary members act jointly with the shell.
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| A standby device for switching.
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| Free or combined chlorine used to disinfect pool water.
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| An access road or street.
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| 1. An arithmetic mean. 2. An amount obtained by adding the elements of a set and dividing by the number in the set. 3. The ordinary standard.
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| An enclosure or building for keeping birds confined.
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| The weight system based on the pound of 16 ounces and the ounce of 16 drams.
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| 1. Weight. 2. Avoirdupois Weight.
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| 1. Arbitration award. 2. Contract award.
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| The owner or the agent of the owner who awards an original building or construction contract, also known as the prime contract; this term is generally used with public works.
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| American Wire Gauge.
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| Architectural Woodwork Institute.
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| A small sharp pointed hand tool for marking lines or piercing small holes.
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| A window hinged at the top.
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| A sheet of canvas, plastic, or metal stretched on a frame to give shelter over a window, doorway, or other area.
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