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History Of General Motors
The history of General Motors (GM), one of the world's largest car and truck manufacturers, dates to more than a century and involves a vast scope of industrial activity around the world, mostly focused on motorized transportation and the engineering and manufacturing that make it possible. Founded in 1908 as a holding company in Flint, Michigan, as of 2012 it employed approximately 209,000 people around the world.[1] With global headquarters at the Renaissance Center in Detroit, Michigan, United States, General Motors manufactures cars and trucks in 35 countries. In 2008, 8.35 million[2] GM cars and trucks were sold globally under various brands. Current auto brands are Buick, Cadillac, Chevrolet, GMC, Holden and Wuling
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Refrigeration
The term refrigeration means cooling a space, substance or system to lower and/or maintain its temperature below the ambient one (while the removed heat is rejected at a higher temperature).[1][2] In other words, refrigeration is artificial (human-made) cooling.[3][4] Energy in the form of heat is removed from a low-temperature reservoir and transferred to a high-temperature reservoir. The work of energy transfer is traditionally driven by mechanical means, but can also be driven by heat, magnetism, electricity, laser, or other means. Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, and air conditioning
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Transmission (mechanics)
A transmission is a machine in a power transmission system, which provides controlled application of the power. Often the term 5-speed transmission refers simply to the gearbox that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device.[1][2] In British English, the term transmission refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive), differential, and final drive shafts
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Diesel Engine

The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to the mechanical compression (adiabatic compression); thus, the diesel engine is a so-called compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine (gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas). Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites spontaneously. With the fuel being injected into the air just before combustion, the dispersion of the fuel is uneven; this is called a heterogeneous air-fuel mixture
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Bearing (mechanical)

A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts. Rotary bearings hold rotating components such as shafts or axles within mechanical systems, and transfer axial and radial loads from the source of the load to the structure supporting it. The simplest form of bearing, the plain bearing, consists of a shaft rotating in a hole. Lubrication is used to reduce friction
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Automotive Industry
The automotive industry comprises a wide range of companies and organizations involved in the design, development, manufacturing, marketing, and selling of motor vehicles.[1] It is one of the world's largest industries by revenue. The automotive industry does not include industries dedicated to the maintenance of automobiles following delivery to the end-user,[citation needed] such as automobile repair shops and motor fuel filling stations. The word automotive comes from the Greek autos (self), and Latin motivus (of motion), referring to any form of self-powered vehicle.[clarification needed] This term, as proposed by Elmer Sperry[2][
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Delco Electronics
Delco Electronics Corporation was the automotive electronics design and manufacturing subsidiary of General Motors based in Kokomo, Indiana, that manufactured Delco radios and other electric products found in GM cars. In 1972, General Motors merged it with the AC spark plug division and it continues to operate as part of the ACDelco division of General Motors. The name Delco came from the Dayton Engineering Laboratories Co., founded in Dayton, Ohio, by Charles Kettering and Edward A. Deeds in 1909.[1] Delco was responsible for several innovations in automobile electric systems, including the first reliable battery ignition system and the first practical automobile self-starter. Initially Kettering and Deeds were co-workers at National Cash Register Company (NCR). Kettering and Deeds had a lifelong professional relationship and friendship
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Divestment
In finance and economics, divestment or divestiture is the reduction of some kind of asset for financial, ethical, or political objectives or sale of an existing business by a firm. A divestment is the opposite of an investment. Divestiture is an adaptive change and adjustment of a company’s ownership and business portfolio made to confront with internal and external changes.[1] Firms may have several motives for divestitures:
  1. a firm may divest (sell) businesses that are not part of its core operations so that it can focus on what it does best. For example, Eastman Kodak, Ford Motor Company, Future Group and many other firms have sold various businesses that were not closely related to their core businesses.
  2. to obtain funds. Divestitures generate funds for the firm because it is selling one of its businesses in exchange for cash
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Vauxhall Motors

Vauxhall Motors Limited[6][note 2] (/ˈvɒksɔːl/) is a British car manufacturer subsidiary of Opel and, from 2017 onwards, part of French Groupe PSA's British operations. It is based in Chalton, Bedfordshire, England. Vauxhall's vehicle lineup is identical to that of Opel, but the Vauxhall brand is exclusively used in the UK (including the Channel Islands and the Isle of Man). Vauxhall is one of the oldest established vehicle manufacturers and distribution companies in the United Kingdom. Vauxhall sells passenger cars, electric and light commercial vehicles under the Vauxhall marque, and formerly sold vans, buses, and trucks under the Bedford Vehicles brand. Vauxhall has been the second-largest selling car brand in the UK for more than two decades.[7][8] Vauxhall was founded by Alexander Wilson in 1857 as a pump and marine engine manufacturer
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