backflow

The backflow preventer must be installed upstream of the regulator.

防倒流装置必须安装在调节阀的上游位置.

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.

They prevent steam backflow from the header to the boiler.

这种阀门能够防止蒸汽从集气箱倒流到锅炉里.

Single well backflow tracer test There is reflux of barium into the terminal ileum.

单井示踪剂回流试验钡剂反流进入回肠末端。

To protect the potable water supply from backflow a non-potable source due a drop in supply.

防止由于高度降低而受到 非 饮用水源回流到饮用水供应系统中.

However, backflow may now be creating other side effects.

不过, 眼下回流可能正在引发其它一些负面影响.

For use with backflow preventer test cocks to protect from damage.

用于防回流阀测试旋塞,防止受到破坏.

Four required per backflow preventer.

每个防回流阀需要四个.

The shutoff valve with cock is to be mounted on inlet side of the backflow preventer.

咨询州和当地规程,确保防回流阀的安装符合有关要求,如地面上适当的高度.

The shutoff valve with the test cock is to be mounted on the inlet side of the backflow preventer.

带测试旋塞的关闭阀安装在防回流阀的进口一侧。

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.

Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.

防回流阀采用耐腐蚀的300系列不锈钢制造.

Especially made for testing all reduced pressure zone backflow preventers.

专用于检测所有减压区防回流阀.

Installing a backflow preventer in a pit or vault is not recommended.

不建议在坑内或拱顶内安装防回流阀.

From this causes two backflow agitation efficiency not high substantial clause.

由此引起二次回流搅动效率不高的重要原因.

Efficiency and backflow current are the two most important criteria of multistage depressed collector.

效率与电子回流是多级降压收集极的两个非常重要的指标.

To avoid this discharge, install a spring-loaded, rubber seated check valve ahead of the backflow assembly.

为了避免这种排放，要在防回流阀总成前面安装一个弹簧驱动、橡胶阀座的止回阀。

During irrigation period , the backflow from the farmland pollutes the branch.

每当农业灌溉之时, 支流都因倒流而严重污染.

Preventive management of veinous backflow obstruction of infrahyoid myocutaneous flap

舌骨下肌皮瓣静脉回流障碍的预防性处理

Contact the factory for specific approvals on the reduced pressure backflow preventer.

如果需要特殊的减压防回流阀的认证,请与工厂联系.

Non-return valve ( including the end of valve )-used to automatically prevent the backflow tube medium.

止回阀 ( 包括底阀 ) — 用于自动防止管道内的介质倒流.

Media type check valve for preventing backflow.

止回阀类用于阻止介质倒流.

Piping used to supply hydrogen chloride into any liquid system must include backflow prevention.

用于给任何液体系统供应氯化氢的管道系统必须包含防止回流装置.

DL-10 and D-50 as backflow aids, for which the most important performance property is small amount and low rate of adsorption and high contact angle on the coal surfaces, and weak wettability of these surfaces, besides of high interfacial activity;

所选助排剂为DL10和D50，对助排剂的要求除界面活性高外，更重要的是在煤样表面吸附量小，吸附速率小，接触角大，不易润湿煤基质表面；

The auxiliary line shall consist of an approved backflow preventer and water meter.

辅助管路应该由通过认证的防回流阀和水表构成.

Upward Rectum vein and lack of venous flap, branching, easy to YuJi blood backflow.

直肠静脉及其分枝缺乏静脉瓣, 血液不易回流, 容易瘀积.

Slowly open upstream shutoff and allow the backflow preventer to fill slowly.

慢慢开启上游关闭阀,让防回流阀慢慢注水.

And then, it can reflect the blood vessel flux of internal carotid plexus, intracranial sector and vertebral, the quantification target of vein backflow drag.

据此可反映出颈内动脉颅内段和椎动脉的血管流量以及静脉回流阻力等定量指标。

A triple purpose product featuring a toilet tank ball cock fill valve, anti-siphon backflow preventer, and a thermal expansion relief valve.

一种三用产品，具有马桶水箱浮球注水阀，反虹吸防回流阀，和热膨胀安全阀。

Backflow, separation and vortices result from hub leakage lead to a complex flow structure near hub in the stator passage.

由泄漏流引起的回流、分离和旋涡等使静子中靠近轮毂处流场十分复杂。