When the pump sets lose electricity during operation, for the sake of preventing pipe failure by negative pressure, installed a surge shaft at the head of the pipe line.
当泵组运行失电时，为防止负压对管道的破坏，在管道首都设置了调压井。
When the pump sets lose electricity during operation, for the sake of preventing pipe failure by negative pressure, installed a surge shaft at the head of the pipe line.
当泵组运行失电时，为防止负压对管道的破坏，在管道首都设置了调压井。
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