在恒速泵凝结水系统中，依靠节流调节维持除氧器和凝汽器水位存在种种缺陷。
In this paper, disadvantages of using throttle to adjust and maintain water levels of deaerator and condenser in constant speed pump condensate system were presented.
泵、风机类负载通常采用鼠笼式异步电动机拖动，恒速运行。
Pump, air pump and so on generally is pulling by squirrel - cage motor, moving in constant velocity.
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