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川辺謙一＠交通技術ライター

kawaberry.bsky.social

did:plc:ud3qrzt6cqcmrinx3a4zla3l

元技術者｜鉄道・道路・都市｜著書25冊（海外版3冊）｜新刊『最新図解鉄道の科学』発売中｜行き先を決めないドライブが好き https://linktr.ee/kawaberry