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The water level in some lakes may vary greatly. 某些湖泊的水位变动极大。
The drought depressed the water level in the reservoirs. 干旱使水库的水面降低
The water level in some 'barrier lakes' is high and rising. 部分堰塞湖的水位比较高，并且还在增长。
the water level in drum 汽包水位
The lack of rain had depressed the water level in the reservoir. 雨的缺少使水库的水位降低了。
The water level in the reservoir is low because of the long drought. 因为久旱，水坝的水位非常低。
A floating ball attached to a lever to regulate the water level in a tank. 浮球储液罐内连在杠杆上用来调节液面的浮球
The water level in the reservoir was low because of the long drought. 因为久旱,水坝的水位非常低。
A lowering of the water level in a reservoir or other body of water. 池降水库或其它水体的水位降低。
What will happen when the water level in HPH reaches high-high level? 当高压加热器在高---位时，会发生什么情况？
Make sure to top up the water level so that is always remains the same. 一定要把水注满使水平高度总保持不变。
Reduce spillage by keeping the water level in rinsing and washing tanks to a minimum. 尽量降低冲洗及洗濯器的水位,以避免食水在操作期间溢出。
The cleaning rakes are automatically activated when the screens get sufficiently clogged to raise the water level in. 当隔栅被堵塞到栅条前端的水位升高至足够高度时,清理耙被自动激活。
Operate the pump and bring the water level in the Gauge just below the water level in the Well tube. 用打气筒打气,使压力表中的水位升至刚好低于油井管中水位的位置。
The water level in 08-well in Shandong province was not only effected by atmosphere but also by rainfall. 山东鲁08井除受气压对水位影响外,降雨对井水位亦产生“效应”,在1980年六次降雨中(降雨量超过10毫米时)均引起该井水位突升。
But in recent years, a shortage of rain has decreased the water level in Lake Mead. 但是最近几年里，由于雨水短缺导致该湖水位下降。
Almost at once,the water level in the tube went down a little,but then it started to go up,until the water poured out over the top. 立刻，玻璃管中的水面有些下降，但接着又上升，直到有色水从管口溢出。
Analysis and Solution on Metering Error of Water Level in Drum in Heat Power Plant 火电厂汽包水位测量误差分析及措施
The remote measurement of water level in ECR. 集控室水位遥测。
Almost at once, the water level in the tube went down a little, but then it started to go up, until the water poured out over the top. 立刻，玻璃管中的水面有些下降，但接着又上升，直到有色水从管口溢出。