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更新日期：2017-11-01
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A truck (or lorry) is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration; smaller varieties may be mechanically similar to some automobiles. Commercial trucks can be very large and powerful, and may be configured to mount specialized equipment, such as in the case of fire trucks and concrete mixers and suction excavators.
Semi Trailer is a freight trailer that when attached is supported at its forward end by the fifth wheel device of the truck tractor. Semi trucks, also known as semi trailer trucks, tractor trailer rigs or 18 wheelers, transport over 70 percent of the goods and commodities in the United States.
