The calculated result from an example shows that the stable sectional area reduces with the increase of working head, or the decrease of the tailrace tunnellength.
计算结果表明，尾水调压室断面面积随水轮机工作水头的增大或尾水洞长度的缩短而减小。
2
Additionally, its33.5-mile length makes it the longest tunnel currently in use.
此外，其33.5英里的长度使其成为目前使用中最长的隧道。
3
This big tunnel with the length of 505 meters is the most magnificent part of that complex.