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.
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。
A few forms of the crossover pipe-adjustment valve combination in vertical single pipe hot water heating system are analysed and compared each other in adjustment performance.
对垂直单管热水供暖系统中几种跨越管—调节阀组合形式的调节性能进行了分析比较，从而得出调节性能最佳的方式。
Based on the practical experience for many years, performs simpler reforms of the conformation of original single? Pipe heating system.
根据多年的实践经验，对原有单管供暖系统的结构进行了简单的改造。
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