혹시 floating down operation(으)로 찾으셨나요?

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• 일렉트릭 보트 GD 플로팅 독 코네티컷 조선소 #일렉트릭 보트 #GD #618피트 길이 The primary floating dry dock at General Dynamics Electric Boat's Groton, Connecticut Navy's massive Columbia-class submarines, it stands typically 60 feet above the adjacent deck when in operation blog.naver.com · 2026.07.16