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How are heavy loads carried by road?
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The largest and heaviest loads are carried on a special low trailer pulled by a powerful tractor unit. This vehicle has six axles to spread the load. The tractor unit has six sets of wheels. Four of them are driven by the engine to give maximum power.
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Science & Technology
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Chapter:
Land Travel
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