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Bridge extension device Koyuma still water construction method
Patent No. 4378427
East Japan Expressway Co., Ltd.Product Summary
Features/Specifications
Achievements (sales/construction/introduction)
Our company:
Other road companies:
Public bodies:
71箇所（北海道、東北、関東、新潟支社管内）
39箇所（NEXCO中日本、NEXCO西日本）
13箇所（福島県、富山県、鳥取県、北陸地整、新潟市 等）
Joint patent: Nitta Corporation / Asahi Kako Co., Ltd.
