Therefore it is in urgent need to develop and promote the heat supply system of low steam pressure heat pump, in which the steam working pressure is below 0.
通过设计、研究和生产运行实例，分析了低压蒸汽热泵的技术要点及推广价值。
Therefore it is in urgent need to develop and promote the heat supply system of low steam pressure heat pump, in which the steam working pressure is below 0.
通过设计、研究和生产运行实例，分析了低压蒸汽热泵的技术要点及推广价值。
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