Keywords: Blasting for service tunnel penetration of Kammon railway tunnel.jpg ja 前田米蔵鉄道大臣が 京の鉄道 大臣室から関 トンネル試掘 道の貫 発破の信号を る en MAEDA Yonezo the minister of railways of Japan at that time indicates break-through blasting of service bore of Kammon railway tunnel from his office at ministry of railways Tokyo Japan 1939-04-19 建築工事画報1939年5 号 関 海底鉄道の試掘 貫 Ministry of Railways Japan / 鉄道 other versions Custom license marker 2015 06 01 PD-Japan-oldphoto Uploaded with UploadWizard Kanmon Railway Tunnel Yonezō Maeda |