sentences:  Designers and builders then went to offer the design and the boat for sale to return their cost.Soviet engineers, among others, visited the yard in 1932 and were generally satisfied with the design, but suggested several modifications and improvements, in expectation of future local production.Another group of engineers went next year to the IvS office in The Hague, as well as the Bremen office of Deschimag, and then attended the completed boat's trials in Cartagena.