应提供一个软管以便在断电时用自来水冲洗循环管路。

A flexible hose should be provided to flush the circulation line with city water, in case of a power cut.

youdao

应提供一个软管以便在断电时用自来水冲洗循环管路。

A flexible hose should be provided to flush the circulation line with city water, in case of a power cut.

youdao