backflow connection 中文意思是什麼
-
Performance requirements for hose connection backflow preventers
軟管連接防迴流裝置的性能要求 -
Installed at the residential fire sprinkler service connection to the main, series 07s dual check backflow preventers protect the water supply against polluted water being siphoned back from the sprinkler system
安裝在住宅消防噴淋頭與主管道連接處，系列07s雙止回防迴流閥保護水供應系統不會受到從噴淋系統中虹吸回來的污染水的污染。
分享友人