siphon spillway WESTBANK 虹吸溢道

side spillway WESTBANK 侧溢水

tunnel spillway WESTBANK 腿洞溢道

submerged spillway WESTBANK 潜式溢洪道

side channel spillway WESTBANK 侧渠溢道

spillway gate WESTBANK 溢洪闸

spillway control device WESTBANK 溢洪控制设备

spillway apron WESTBANK 溢洪道海堤

spillway crest WESTBANK 溢道顶