The "Kanda River and Loop 7 Underground Regulating Basin" (inner diameter 12.5 meters, total length 4.5 kilometers) was built under Loop 7. The Tokyo Toughening Project will connect it to other control basins.
The "Kanda River and Loop 7 Underground Regulating Basin" (inner diameter 12.5 m, total length 4.5 km) built under Loop 7. It will be connected to other control basins in the "Tokyo Toughness Improvement Project.
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Authorization requested before purchase
Authorization requested before purchase