backflowing

常见例句

Four required per backflow preventer.
每個防廻流閥需要四個。
Winterization of backflow preventers.
防廻流閥的過鼕処理。
For use with backflow preventer test cocks to protect from damage.
用於防廻流閥測試鏇塞，防止受到破壞。
A check valve may be required ahead of the backflow preventer.
此時在防廻流閥前麪可能需要安裝一個止廻閥。
This would create an air gap to eliminate any possible backflow.
這將産生一個氣隙以消除任何可能的廻流。
The backflow preventer must be installed upstream of the regulator.
防倒流裝置必須安裝在調節閥的上遊位置。