water level recovery

• 水位恢复

water level recovery的用法和样例：

例句

1. When the water is full,the BWF should be stopped immediately, then to weak firing and open blowdown and drain valves till the water level returns to normal.
   满水后应减少给水或及时排水，立即停止锅炉给水，并减弱燃烧，开启排污阀及流水阀，直到水位恢复正常后才关闭。