this is a standard trailer pulled behind a tractor truck wiyj8
wheels at the back of the unit
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It's used to refer to the power unit of a semi-articulated
tractor-trailer. In reality, any truck pulling a trailer could be
considered a truck tractor.
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Usually by means of the Qualcomm unit mounted in the
tractor.
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At Tractor shows & aoto jumbles/sales.Tractor enthusiasts
magazines for sale column