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[Envelope from the Chief of the First Section, Naval General Staff, to Hiraga; Naval Technical Research Institute period]
- AI summary (β)
- An envelope, titled “[Envelope from the Chief of the First Section, Naval General Staff, to Hiraga; Naval Technical Research Institute period].” It appears to be an envelope relating to correspondence from the Chief of the First Section, Naval General Staff, to Hiraga, and its category is armor and protection in warship structure. The text confirmation area contains “3123456789” and the date “February 21,” but the year is unknown. Held by the University of Tokyo Kashiwa Library; number of pages: 2. Keywords: Chief of the First Section, Naval General Staff; Hiraga; Naval Technical Research Institute; envelope; warship structure; armor; protection; February 21Auto-generated by Azure OpenAI gpt-5.5 from OCR text (which may contain errors) and image captions.
- Item ID
- 1fb41a68-f40a-4c65-8d3c-9cba90c57951
- Catalogue ID
- 22380102
- Card catalogue
- [Materials Related to Protection against Projectiles] 2-1
- Doc type
- 封筒
- Category
- 軍艦構造:装甲・防御
- Extent
- 1 sheet
- Holder
- 東京大学柏図書館
- Year registered
- 2007
- GCV entities
- Drawing












































