Hand hole cleanout - provides easy access to the heater interior for inspection and cleaning.

人工清洗孔- - -使人工观察和清洗热水器内部更加方便。

youdao

Hand hole cleanout - provides easy access to the heater interior for inspection and cleaning.

人工清洗孔- - -使人工观察和清洗热水器内部更加方便。

youdao