A heating device consisting of a series of connected pipes, typically inside an upright metal structure, through which steam or hot water is circulated so as to radiate heat into the surrounding space.

• 散热器一种由一系列连接的管道组成的加热器，尤用于直立的金属结构内，蒸汽或热水在其内部循环以向周围空间释放热量