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Technologies and Innovation
Projects
by Construction Facilities
Road and Tunnel
Sanyo Expressway Ryugatake Tunnel
Sanyo Expressway Ryugatake Tunnel

| Location | Yamaguchi/Japan |
|---|---|
| Completed | 1992 |
This Page is Home
Technologies and Innovation
Projects
by Construction Facilities
Road and Tunnel
Sanyo Expressway Ryugatake Tunnel

| Location | Yamaguchi/Japan |
|---|---|
| Completed | 1992 |