通常，采暖系统可以分为热水采暖系统和蒸汽采暖系统两种。

In general, heating system can be classified into hot water heating system and steam heating system.

youdao

通常，采暖系统可以分为热水采暖系统和蒸汽采暖系统两种。

In general, heating system can be classified into hot water heating system and steam heating system.

youdao