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The Onon River is a waterway that flows through Mongolia and Russia. It serves as an important geographic feature in this region, helping to shape the landscape and ecosystems of northeastern Mongolia and the areas it traverses in Russia.
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The Onon is a river in Mongolia and Russia. It is 1,032 kilometres (641 mi) long, and has a drainage basin of 96,200 square kilometres (37,100 sq mi).
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