Designed to retrofit backflow protection onto fire hydrants used for temporary water service.

适用于用在临时性水应用的消防栓上的防回流阀的更新改造。

youdao

Designed to retrofit backflow protection onto fire hydrants used for temporary water service.

适用于用在临时性水应用的消防栓上的防回流阀的更新改造。

youdao