Prototype 20 tons built in the early nightees Permalink
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We have already prooved that we can build concrete submarines - so it is clear that we also can build concrete floating structures of a much simpler kind …
Prototype 20 tons built in the early nightees Permalink
. . . . .
We have already prooved that we can build concrete submarines - so it is clear that we also can build concrete floating structures of a much simpler kind …