Keywords: TanabeTunnelFig011.jpg Section of the Second Lake Biwa Canal completed in 1912 琵琶湖疏水第2疏水トンネル断 cite book 田邉 郎 Sakur TANABE 1922 p 9 Figure 11 とんねる Tunnel Japanese 丸善 Maruzen 京 Tokyo 2008July18 Maxima m Biwako Canal Cross sections of tunnels Tunnels in Japan Canal tunnels Aqueducts in Japan 1910s technical drawings PD-Japan |