本文通过分析采暖系统中的空气的来源，提出空气在系统中的危害，针对单户计量系统中水平管坡度较小，提出水平支管中水流速应保持较大。
This paper analyzes air source in heating system, states that gas is harmful in the system, points out level pipe gradient being small in single measure system, and velocity of flow must keep great.
分析了单管顺流式热水采暖系统出现垂直失调问题的原因，提出了解决措施。
This paper analyzes the causes of the problem of vertical disorder of single-pipe series-loop hot water heating system and suggests some approaches.
分析了单管顺流式热水采暖系统出现垂直失调问题的原因，提出了解决措施。
This paper analyzes the causes of the problem of vertical disorder of single-pipe series-loop hot water heating system and suggests some approaches.
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