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当除氧器内工作蒸汽压力升高,给水泵入口发生汽化的可能性就越大。()...
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热力除氧的原理是建立在气体的溶解定律—()定律的基础上的。...
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泵发生气蚀现象处理办法()。A、提高泵入口压力;降低液体温度B、改变出口流量C、降低泵入口压力;提高液体温度D、将泵腔灌满液体...
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设备管理的“四懂”是()。A、懂性能B、懂原理C、懂结构D、懂用途...
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给水泵在运行中发生汽化原因主要是倒灌高度不够引起的。()...
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水泵密封环处的轴向间隙应()泵的轴向窜动量。A、大于B、等于C、小于D、小于等于...
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