sentence: they built the first soviet industrial device for continuous pouring of steel , developed an automated process of pouring and cutting slabs with the use of radioisotope technology , produced the first soviet hydrofoil ( raketa ) , designed and built passenger diesel - electric ships lenin and soviet union for the volga river navigation company , the first high-speed passenger hovercraft sormovich , a few diesel-electric railroad ferries for the baku - krasnovodsk route , and a unique 250-tonne double-hulled floating crane kyor-ogly .