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A tractor trailer is made up of a tractor unit (the vehicle's power unit) and a semitrailer (connected to the tractor unit). The tractor unit is usually a large truck that pulls the trailer. A tractor trailer is a huge trailer, usually a flatbed, that transports cargo. Tractor trailers haul huge and heavy cargo including building materials, agricultural supplies, and manufactured goods. Conta
A tractor trailer is made up of a tractor unit (the vehicle's power unit) and a semitrailer (co