热水供暖系统基本形式综述
Basic forms of the hot water heating system
摘要：
提出了热水供暖系统形式的分类方法，列出了系统形式分类总表、系统形式图式，并对各种系统形式的特点及适用条件等进行了论述。
关键词：系统形式 上供下回 下供上回 下供下回 单管 双管
Abstract：
Proposes the classification method of the hot water heating system forms, presents the classification table and chart of system forms, and discusses the characteristic and application condition of different system forms.
Keywords:system form, up-supply and down-return, down-supply and up-return, down-supply and down-return, single-pipe, two-pipe