It is diaphragm type back pressure valve.
背压阀为隔膜式，能调整设定压力。
The compressor has to start with back pressure!
压缩机将负压启动！
Seating load and tightness is dependent on back pressure.
阀座密封负载和紧密性与反压力相关。
Shaft seal is adapted, which can bear higher back pressure.
采用进口轴密封，能承受高背压。
Seating load and resultant tightness is dependent upon back pressure.
阀座密封负载和组合的紧密性是与返回压力密切相关。
Several different types of valves are in use. Some are back pressure valves.
有几种不同的阀在使用中，有些是反向压力阀。
Complex pipe can be established by the method of back pressure pigging, caliper.
复杂的管道可采用建立背压的方法进行清管、测径。
Excessive back pressure, freezing, or water hammer has distorted the second check.
过于严重的反压力、冰冻或水锤扭曲了第二止回阀。
If this pressure is maintained, Pakistan can still be dragged back from the brink.
如果保持这样压力，巴基斯坦仍能被从危险的边缘拉回。
Some are swept back by radiation pressure from sunlight to create straight dust streaks.
其中的一些碎片受阳光的辐射压力作用形成与周围星尘不同的直条状。
You could also apply pressure to the back of your head, just at the base of your skull.
你也可也在后脑上略施压力，就在头骨基部。
But it was essential to keep up the pressure if they were not to come back.
但要使他们不能东山再起，必须持续施加压力。
The green budget measure turns the pressure back on his critics.
这些绿色预算措施将压力施加给陆先生的批评家们。
Expand it, lower the pressure, all goes back into the gas phase.
膨胀，压强降低，所有的都回到气态。
If we slackened off our pressure in Italy, they would go back again.
如果我们在意大利放松施加压力，他们又会被调回。
In 20 minutes your blood pressure will drop back down to normal.
20分钟内你的血压将降至正常水平。
Put back the sample flow pressure.
样品气压力流量复原。
Yesterday he took back the pressure test pump from machine shop.
昨天他从机厂取回了试压泵。
It's all about getting comfortable and taking pressure off your lower back.
这样都是为了更舒适，减少背部压力。
My doctor says I should cut back on sodium-rich foods to lower my blood pressure.
医生说我必须少吃含钠高的食物以降低血压。
Don't put pressure on yourself to get back into shape quickly.
即使你很泄气，也不要强迫自己为了好身材投入大量的训练。
Come back again next week for the results and another check of your blood pressure.
一周后来复诊看化验结果和复查血压。
Back-pressure protection is needed to prevent damage to the regulator.
需要回压保护，以防止损坏调整器。
With the pressure increasing, the upper plate would spring back to its original place.
随着压力的增强，上面的板快反弹回来原来的位置。
To take a stand on something and not back down under pressure.
表明自己的立场并不因压力而退缩。
Would you still come back until you have no pressure?
等你没有了压力，你还会回来吗？
Would you still come back until you have no pressure?
等你没有了压力，你还会回来吗？
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