明管 exposend penstock
地下埋管underground penstock
坝内埋管 embedded penstock within dam
回填管 buried penstock
岔管 branch pipe
无梁岔管 shell type branch pipe
三梁岔管 three-girders rienforced branch pipe
月牙肋岔管 cersent-rib reinforced branch pipe
球形岔管 spherical branch pipe
贴边岔管 hem reinforced branch pipe
支墩 support