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。
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。
The formula for calculating the back pressure to formations is derived.
推导了计算对地层回压的公式。
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。
The effects of back pressure on the spray penetration, the spray Angle, etc. are also discussed.
文中还分析了背压对穿透、雾化锥角等的影响。
Diplegs play an important role as pressure seals against the considerable back pressure generated.
料腿则起着对产生的相当大的背压加压密封作用。
Fast response and high flow is often critical to maintaining tank pressures in back pressure applications.
快速响应和高流动性，往往关键维护应用在反压罐压力。
The pressure loss caused the increase in exhaust back pressure, leading to the decrease in charge efficiency.
压力损失使发动机的排气背压升高，引起充气效率下降；
The wall thickness of the tube will be increased with increasing back pressure or increasing friction coefficient.
管材弯曲内外侧壁厚随着反推压力的增大或摩擦系数的增大而增大。
Eventually we will have lowered the back pressure enough so that it is now equal to the pressure at the nozzle exit.
最终我们将有降低回压足以使现在是相等的压力，在喷嘴出口。
Back pressure higher than 80%, to row non-condensing gas, diaphragm solid, long life, easy maintenance, using a wide range.
背压率大于80%，能排不凝结气体，膜盒坚固，使用寿命长，维修方便，使用范围很广。
According to flow in a different, balanced spool valve the pressure can be pre-pressure, can also be a back pressure valve.
根据流向不同，平衡阀芯所受的压力可以是阀前压力，也可以是阀后压力。
But because of reduced injection timing and increased exhaust back pressure, the BSFC of the engine will be increased of 8%.
但由于提前角减小，排气背压增大，发动机燃油消耗率上升8%左右。
In the triaxial tests back pressure was applied before consolidation to the specimen with a coat of silicon oil on both ends.
试验中采用了固结之前施加反压力及在试样两端涂硅脂等项技术。
The research result shows that this principle and method provide a new thought to the design of back pressure pneumatic gauge.
研究结果表明，该原理和方法为背压式气动量仪的设计提供了一种新的思路。
The mass flow of the gas pump is higher than the liquid pump under the same voltage, but back pressure of the gas pump is lower.
在相同电压驱动下气体无阀泵的流量要高于液体无阀泵，但气体泵的背压较低。
Practice proved that adding chemicals not only decreases the viscosity of crude but also the back pressure of well head decreased.
实践证明，掺污水加药既可以降低原油粘度，又可以有效地降低井口回压。
According to the application and can be divided into low back pressure type, back pressure type, in high back pressure type compressor.
按应用范围又可分为低背压式、中背压式、高背压式压缩机。
The relation between mixer back pressure and minimum fan pressure was developed, which could used to select the fan when design a premixed burner.
提出了混合器出口背压与所需风机的最小压头之间的关系式可以用于预混燃烧器风机的选取；
The regenerating process of the DPF system was proven effective through controlling the exhaust flow rate and the back pressure of regeneration point.
后处理系统通过废气流量及再生点背压对红外再生过程进行控制的方法是有效的。
The flow rates of the micropump are measured, and the result shows that the voltage, frequency and the back pressure all have an influence to the flow rates.
对压电微泵的输出流量进行了测试，结果显示：电压、频率以及背压对流量均有显著影响。
At present heat rate calculate of the double back pressure turbine is according to single back pressure turbine, which brings deviation of heat rate calculate.
目前双背压汽轮机是按单背压汽轮机来进行热耗率计算的，由此带来热耗率计算的偏差。
Here an example is: heating the feedwater of condensing turbine by exhaust steam of a back pressure turbine (through tubular steam cooler) to raise the set's heat economy.
介绍一例：利用管式蒸汽冷却器将背压机排汽加热凝汽机给水，从而提高机组热经济性。
Thermal distortion of mirrors caused by high power CW laser radiation and pressure distortion by water-cooled back pressure have been measured using a Twyman-Green interferometer.
采用泰曼-格林干涉仪，测量了反射镜在高功率激光连续辐照下发生的热形变和镜背侧冷却水压造成的压力形变。
The results show that the number of regenerative stages in air-cooled units should not be reduced with increasing back pressure for calculating optimum cnthalphy rise distribution.
结果表明，对于空冷机组，在进行焓升最佳分配计算时，回热级数不能因背压提高而减少。
The results show that the number of regenerative stages in air-cooled units should not be reduced with increasing back pressure for calculating optimum cnthalphy rise distribution.
结果表明，对于空冷机组，在进行焓升最佳分配计算时，回热级数不能因背压提高而减少。
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