bn:02404077n
Noun Concept
Categories: Bunkers, World War II strategic bombing, All articles that may have off-topic sections, Submarine bases
EN
submarine pen  U-Boat bases  Elbe II bunker  Elbe II U-boat bunker  Sub pen
EN
A submarine pen is a type of submarine base that acts as a bunker to protect submarines from air attack. Wikipedia
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EN
A submarine pen is a type of submarine base that acts as a bunker to protect submarines from air attack. Wikipedia
A type of submarine base Wikipedia Disambiguation
Type of submarine base that acts as a bunker to protect submarines from air attack Wikidata