... 上游水位 affluent level; affluentlevel; head water elevation; head water level; retention elevation; upper level; upper pond level; upper pool elevation; upper pool level; upstream water level 上游水位线 upstream water line; upstreamwaterline 上游水箱 upper water tank ...
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Control supply line water pressure. install a soft seated spring loaded check valve upstream of the assembly.
控制供应管道的水压。在总成的上游安装一个软阀座，弹簧负载止回阀。
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。
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