The theoretic calculating method of the maximum and the minimum water level in the differential surge tank has been derived firstly .
根据差动式调压室的基本微分方程，首次推导出了差动式调压室涌浪幅值的理论计算公式；
Revetments protect the space from dam crest to the line a certain distance, normally 2.5m, under the minimum water level of the dam upstream.
护坡覆盖的范围，上游由坝顶护至水库最低水位以下一定距离，一般在最低水位以下2.5米。
Heating steam shall be introduced into the water stored in the feed water tank through a rake of sparger steam pipes below the minimum water level.
加热蒸汽应通过最低水位下的喷洒器蒸汽管耙导入给水箱内储存的水里。
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