This enables the shafts to be lowered into the tank and to operate at the normalwaterlevel.
这样就可以把轴(从上方)吊入罐内,并在正常水位下操作。
2
It refers to space during dam crest level; it is above maximum deposited beach face, storage bottom and normalwaterlevel as well as under maximum flood level.
某坝顶标高时,最高沉积滩面、库底、正常水位三者以上,最高洪水位以下的空间。
3
The waterlevel of the Mississippi River is already 6.5 feet below normal.