Introductionautomobile, self-propelled vehicle used for travel on land. The term is commonly applied to a four-wheeled vehicle designed to carry two to six passengers and a limited amount of cargo, as contrasted with a truck, which is designed primarily for the transportation of goods and is constructed with larger and heavier parts, or a bus (or omnibus or coach), which is a large public conveyance designed to carry a large number of passengers and sometimes additionally small amounts of cargo. For operation and technical features of automobiles, differential; fuel injection; ignition; internal-combustion engine; lubrication; muffler; odometer; shock absorber; speedometer; steering system; suspension; tachometer; tire; transmission.
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