| An assembly with a U-shaped electrified member attached to a ceiling or wall, acting as a channel for sliding light fixtures.
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| 1. A metal way serving as a guide for a movable lighting fixture. 2. Metal channel; see Runner. 3. A specially laid out course, as for racing.
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| A defined area of land.
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| The friction grip of a wheel or track on the surface on which it moves.
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| A discount or dction from a catalog or list price extended to the trade or quantity buyer.
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| An organized association of workers in a trade, group of trades, formed to protect and further their rights and interests.
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| A walking surface placed on top of a roof membrane.
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| A paint, usually white, red or yellow, used to designate traffic lanes, safety zones, and intersections.
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| A posted command, warning, or direction for motor vehicle drivers or pedestrians.
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| 1. The movement of people or vehicles through an area. 2. The passing to and fro of persons with special reference to carpet wear resulting therefrom.
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| A vehicle designed to be hauled or to serve parked as a dwelling or place of business.
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| A tile layout tool used to erect perpendicular lines and to bisect angles.
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| A Beam Compass.
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| Device turned on by change of power from one source for purpose of supplying power in another form to second system.
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| Either arm of the part of a cross-shaped church at right angles to the nave.
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| A switch in an electrical system that transfers the load to another circuit when the voltage drops below a predetermined level.
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| That act of transferring stress in prestressing tendons from jacks or pretensioning bed to concrete member.
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| A precast concrete block or stone placed under a transformer to spread and support its weight.
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| A device that changes, or transforms, alternating current from one voltage to another.
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| Combination transformer and rectifier in which input a-c current may be varied and then rectified into d-c current.
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| An electronic component that switches or amplifies a current; a semiconductor device with three connections.
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| Concrete produced from a central batching plant, where the materials are proportioned and placed in truck mixers for mixing enroute to the job or after arrival there.
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| see Theodolite.
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| A lot in a subdivision that consists of both cut and fill.
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| In a swimming pool, the point at which the floor slope changes from shallow to deep area.
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| Coating compatible with primer and with a finish coat, though the latter is not compatible with the primer; also called Barrier Coating or Block Coating.
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| 1. A passing or change from one place, state, or condition to another. 2. The physical part needed to effect the change, such as a piping rcer.
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| 1. To move from one place to another, without rotation. 2. Motion of a body along a line without rotation or turning.
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| Motion of a body along a line without rotation, or turning.
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| A building panel that permits the passage of light but not vision.
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