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潜水艦推力増強計画
Wikipedia definition
1. Greater Underwater Propulsion Power ProgramThe Greater Underwater Propulsion Power Program (GUPPY) was initiated by the United States Navy after World War II to improve the submerged speed, maneuverability, and endurance of its submarines. (The "Y" in the acronym was added for pronounceability. ) The Navy began the program by testing and reverse engineering two captured German Type XXI U-boats: U-2513 and U-3008.
Read “Greater Underwater Propulsion Power Program” on English Wikipedia
Read “潜水艦推力増強計画” on Japanese Wikipedia
Read “Greater Underwater Propulsion Power Program” on DBpedia

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