backflow

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Media type check valve for preventing backflow.

止回阀类用于阻止介质倒流.

Four required per backflow preventer.

每个防回流阀需要四个.

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.