Неопознанное судно - тип ОС (354, А, Б, К, У)

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Below are the photos of different vessels of the same design, which had not been identified (at least, by the name) when uploading.
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Class:ОС (354, А, Б, К, У)

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Река Дон
Ростовская область, Ростов-на-Дону
Завод "Красный Дон"

Строительство очистительной станции на заводе "Красный Моряк"

Номер в Госкаталоге: 27342123
Номер по КП (ГИК): РОМК КП 21946/35

Received from АМП

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