main circulating water pump
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Through the analysis and comparison of water pressure chart of press boiler and no-press boiler, it is found that their main difference is circulating pump delivery, namely different consumption.
通过对无压锅炉与有压锅炉供热系统水压图的分析和比较，发现二者的主要区别在于循环水泵的扬程不同，即循环能耗不同。
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