seepage free surface

• 渗流自由面

seepage free surface的用法和样例：

例句

1. The type selection of the gyrating flow spillway tunnel is made in two alternatives of horizontal free gyrating flow and submerged flow.
   右岸旋流泄洪洞选型研究是在水平旋流自由流推荐方案与淹没流推荐方案的基础上进行的。