Russian Soviet Federated Socialist Republic/Yamalo-Nenets
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Yamal’skiy Rayon
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Tazovskiy Rayon
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Shuryshkarskiy Rayon
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Purovskiy Rayon
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Priural’skiy Rayon
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Nadymskiy Rayon
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Krasnosel’kupskiy Rayon
Water Treatment .. in Russian Soviet Federated Socialist Republic Yamalo-Nenets ...