在安装之前，要冲洗管线，清除水垢和其他外来杂质。

Before installing, flush out pipe lines to remove scale and other foreign matter.

youdao

请说明管线的现场试验和冲洗(吹净)方法。

Please explain the method of field test and flushing (blowing off) of the pipelines.

youdao

请说明管线的现场试验和冲洗(吹净)方法。

Please explain the method of field test and flushing (blowing off) of the pipelines.

youdao