Keywords: TanabeTunnelFig009.jpg Section of Lake Biwa Canal Tunnel 1 completed in 1890 琵琶湖疏水第1トンネル断 cite book 田邉 郎 Sakur TANABE 1922 p 8 Figure 9 とんねる Tunnel Japanese 丸善 Maruzen 京 Tokyo 2008July18 Maxima m PD-Japan Biwako Canal Cross sections of tunnels Aqueducts in Japan 19th-century technical drawings |