backflow

1 The damage to his heart meant one of his heart valves no longer worked properly, creating a backflow of blood and putting extra strain on his heart.

2 Such as pumping up you must turn off valve to prevent backflow of concrete, then removed the feed tube.

如向上泵送则必须先关闭截止阀，防止砼倒流，然后拆下出料管。

3 Pumps and backflow valves have been put in place.

4 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.

5 Installing one-way valves, called backflow prevention devices, at each water meter can prevent contamination rushing out of the damaged building from flowing into the larger buried pipe network.

6 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。

7 Those traps are supposed to collect water to help stop the backflow, but several were found dry where proper maintenance practices weren’t followed.

8 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.

9 Most veins have one-way valves called venous valves to prevent backflow caused by gravity.

10 The objection against discharging into seas is the operation of the tides, which cause a backflow and overflow of sewage from the pipes.

11 State and city officials have referred to a “backflow problem” at the plant, and Womack said inspectors didn’t find a device in place that prevents contaminated water from flowing backward into a potable water supply.

12 In the event of negative supply pressure such contaminated fluids will not backflow to the supply source by backsiphonage.

万一存在这种污染流体的反压力，则要避免由于反虹吸而回流到供应水源中。

13 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.

14 Residents reported blown manhole covers, flooded houses and sewage backflow.

15 Since then, the ballclub and the stadium district have responded to FM Global's concerns by doing such things as providing proof of backflow prevention gates on storm sewer lines; installing an additional backflow gate, and providing a detailed flood risk analysis for the loading docks.

16 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.

17 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。

18 In addition, veins are structurally different than arteries in that veins have valves to prevent the backflow of blood.

19 But water-distribution networks are pressurized, so backflow can occur only if the pressure drops for some reason and proper backflow preventers are not in place, Freeman said.

20 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.

1 倒流

refluent reflux backwater regorge regurgitation counterflow

2 逆流

upstream countercurrent refluent setback eddy crosscurrent reflow counterflow backset refluence counterstream