Welded construction of all these boats gives them very high strength of the hull.
焊接结构的所有这类型船有着高强度的船体。
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Importing liquid oxygen into liquid-oxygen pot fixed in cabin, or transpiring it from liquid-oxygen pot to outboard, is realized by an especial equipment welded on hull.
The boat is built of steel hull, aluminum - welded deckhouse, round bilge, transom stern, single continuous deck, longitudinal framing, four engines, four rudders and diesel engine driven.