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Igawa, O. , Kouchiwa, H. , Ito, Y.. "Sewer Culvert Installation Method to Accommodate Underground Construction in an Urban Area with Narrow Streets (The Development of Shield Switching Type Micro-Tunneling Method and the Introduction of Construction Examples)". World Academy of Science, Engineering and Technology, Open Science Index 85, International Journal of Civil and Environmental Engineering (2014), 8(1), 1 - 6.