Серая

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Серая flows into Поронай , which it joins at N 49° 34′ 8″, E 143° 6′ 2″ at OSM node n4499649580, and there 5,723 km of total upstream flows in. load it's distributaries

Серая has 3 tributaries.

• Каменка, which joins it at N 49° 36′ 2″, E 143° 6′ 33″ at OSM node n4499650390, and 6 km of total upstream flows in.
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• Самарский, which joins it at N 49° 34′ 55″, E 143° 6′ 15″ at OSM node n4499650304, and 6 km of total upstream flows in.
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• Анис, which joins it at N 49° 37′ 5″, E 143° 6′ 20″ at OSM node n4499650585, and 3 km of total upstream flows in.
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