Traditional knowledge about the rule of backwaterlength variation is reasonable, which is a special case of analytic solution to backwaterlength.
有关回水长度变化规律的传统认识有其合理性,它是回水长度解析理论的一种特殊情况。
2
Backwater is a main influential factor of the effective cavity length, almost a decisive one sometimes.
空腔回水是制约有效空腔长度的一个主要因素,有时甚至是决定性因素。
3
Criterion for the terminal of backwater may have effect not only on backwaterlength, but also on the rule of backwaterlength′s fluctuation with discharge.