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Modern drag races are started electronically by a system known as a Christmas tree. A common Christmas tree consists of a column of seven lights for each driver or lane. Each side of the column of lights is the same. At an NHRA national event, the Christmas Tree, which was first used in April 2011, from the top down, consists of a blue LED ...
Oil well Christmas tree. In petroleum and natural gas extraction, a Christmas tree, or tree, is an assembly of valves, casing spools, and fittings used to regulate the flow of pipes in an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, and other types of well.
WBS – well bore schematic; WBS – work breakdown structure; WC – watercut; WC – wildcat (well) W/C – water cushion; WCC – work control certificate; WCT – wet christmas tree; WE – well engineer; WEG – wireline entry guide; WELDA – well data report; WELP – well log plot; WEQL – well equipment layout; WESTR – well status ...
A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.
The most popular models feature internal crossover time computation (allowing a driver to pick a visual cue from his opponents side of the Christmas tree, the delay box internally does simple math computations for the driver), bump up and bump down compensation (allows a driver to easily make small plus or minus timing adjustments quickly and ...
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An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...
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