回流

An advanced piece of test equipment designed to make pressure and differential gauges obsolete in the testing of backflow preventers.

先进的检测设备，专用于差压计无法清晰检测防回流阀的应用场合。

A strainer should be installed as shown, ahead of backflow preventers to prevent discs from unnecessary fouling.

应该如图所示在防回流阀前安装一个过滤器，防止阀瓣出现不必要的污垢。

When installing a drain line, use Series 909 air gaps on Model 909 backflow preventers.

在安装排泄管线时，在型号909防回流阀上采用系列909气隙。

Backflow preventers must be installed in high-visibility locations in order to allow for immediate notice of telltale discharge or other malfunction.

防回流阀必须安装在非常容易看到的位置，以便于能够立即发现警报性排放或其他故障。

Of course, the Series 7 Dual Check Backflow Preventers embody the quality engineering of Watts, a world leader in valve technology.

当然，系列7双止回防回流阀还是世界阀门技术领头羊的美国瓦茨质量工程的具体体现。

Also, mechanical backflow preventers and air gaps can be bypassed.

此外，机械式防回流阀和气隙可以作为旁路。

An advanced piece of test equipment designed to make pressure and differential gauges obsolete in the testing of backflow preventers.

先进的一件式检测设备，用于在检测防回流阀时完全取代压力和压差表。

Our unique check modules put our Series 7 Backflow Preventers distinctly ahead of other residential containment devices.

我们独特的止回模块结构使得我们的系列7防回流阀住宅保护装置方面明显处于领先地位。

Backflow preventers should never be placed in pits unless absolutely necessary and then only when approved by local codes.

除非绝对必要并经过当地规程的批准，否则绝不应该将防回流阀放置在坑内。

For use with backflow preventers, isolation valve for gauges, isolation valves for small equipment lines.

TC 用于防回流阀，用于仪表的隔离阀，用于小型设备管道的隔离阀。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。