地下鉄工事崩落1ヵ月　「支保工」に新型鉄パイプ・安全規則に規定なし 地下鉄工事崩落1ヵ月　「支保工」に新型鉄パイプ・安全規則に規定なし

The archive of the Disaster Reduction and Human Renovation Institution holds documentation and items created or used during the process of recovery and reconstruction of the afflicted communities in t...