逆流

采用水基钻井液欠平衡钻开砂岩气层时，欠平衡压差往往并不能完全抵消岩石的自吸毛细管力，从而产生逆流自吸效应。

When the sandstone gas reservoir is drilled open by the underbalanced drilling using water based mud ( WBM ), the underbalance pressure normally can hardly offset the imbibition capillary force of the rock , which may result in backwash imbibition .

间歇逆流清洗用水量比连续逆流清洗用水量少，从节水和回收的角度来说，间歇逆流喷淋清洗是保证清洗效果、减少水量的有效方法。

Water consumption in intermittent backwash cleaning is less than continuous backwash cleaning . From the viewpoint of water saving and recycling , intermittence backwash spray cleaning is the most efficient method to ensure the cleaning effect and decrease the amount of water .

由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。

Dangerous undertows make swimming unsafe along most of the coastline .

塞弗博士是这一观点逆流的一部分

Dr Zyphur is part an insurgency against this idea .

超临界CO2双柱逆流萃馏浓缩天然维生素E的最佳工艺研究

The optimum technology of concentration natural vitamin E with supercritical CO_2 two-column countercurrent extraction

pH区带逆流色谱研究进展

Research and Improvement of pH-zone-refining Countercurrent Chromatography

文中着重探讨了影响pH区带逆流色谱分离效果的流动相流速、逆流色谱转速、溶剂组成、样品量和酸碱度等主要影响因素。

The main factors for the separative effect of pH-zone-refining Countercurrent Chromatography are discussed in this paper .

附加的配置有电掌控的催化剂逆流器以及先进的ABS功能。

Optional extras include a computer-controlled catalytic converter and advanced ABS .

（season被误为seasoning调味品）每年春天，鲑鱼逆流而上游到勺子里。

In spring , the salmon swim upstream to spoon .

微生物发酵产辅酶Q（10）的高速逆流色谱法分离纯化

Separation and Purification of Coenzyme Q_ ( 10 ) from Microbial Fermentation by High-speed Counter-Current Chromatography

逆流鼓泡塔气含率分布的试验测量与CFD模拟

Experiment and CFD Simulation of the Gas Holdup Distribution in Countercurrent Bubble Column

DEM与乙醇水溶液的逆流萃取研究

Counter - flow Extraction Separation of DEM and Ethanol Aqueous

HAT循环逆流式湿化器的热力性能实验研究及冷却数计算

Thermodynamic Performance Experimental Study and Cooling Number Calculation of Counter-flow Spray Humidifier in HAT Cycle

研究了一个从低品位钨原料生产高纯仲钨酸铵（APT）的新的湿法冶金过程。流程包括两段逆流浸出；

A new hydrometallurgical process for producing high-purity ammonium paratungstate ( APT )

患者表现出受pH值与胃食管反流症状的研究或手术后应被视为与质子泵抑制剂的长期逆流。

Patients with demonstrated reflux by pH study or with reflux symptoms after surgery should be treated long-term with proton pump inhibitors .

上层常年受北赤道流和北赤道逆流控制，其交界位于9°N附近。

North Equatorial Current and North Equatorial Counter Current are the main currents most of the year in the upper sea of the area .

逆流两段再生FCC装置烟气分布板喷嘴缩径改造

Reducing nozzle diameter of flue gas distributor in the revamp of countercurrent two-stage FCC regenerator

苯的逆流峰加宽因子h稍大于直流峰加宽因子h′。

The reverse flow zone broadening factor , h , of benzene is somewhat larger than the straight through flow zone broadening factor , h ' .

目前，关于鼓泡塔内气液逆流操作的CFD模拟计算还很少。

At present , a few CFD simulations of countercurrent of liquid and gas in the bubble column are found .

逆流色谱（Counter-currentChromatography）作为一种液液分配色谱技术，广泛应用于天然产物的分离制备中。

Counter-current chromatography is a liquid-liquid partitioning chromatography , broadly applied in separation and preparation of natural products .

另外，在这支上面提到的海流路径上31°N附近有时会出现逆流，这主要受对马暖流流入朝鲜海峡的流量大小控制。

Sometimes a countercurrent appears on the path of the above mentioned current near 31 ° N , which is mainly controled by the flow of the Tsushima Current passing through the Korea Strait .

气液逆流加氢工艺很好的解决了温度、氢分压和H2S吸附的匹配问题并通过小试和中试试验证明了逆流操作方式的优势，这对于获得超低硫清洁柴油非常有必要性。

Counter-current hydrogenation technology had a good solution to matching problem as temperature , hydrogen pressure and H2S adsorption .

PTCD术中对比剂胰管逆流与共同管的关系探讨

Relationship between Pancreatic Duct Contrast Reflux during PTCD and the Length of Common Pancreatobiliary Channel

Marley逆流式冷却塔在炼厂的应用

Application of Marley Countercurrent Cooling Tower in Refinery

复苏后6h，雄性组毛细血管后小静脉内血流出现时快时慢甚至逆流的现象，说明雄性大鼠创伤失血性休克后微循环出现紊乱。

Six hours after resuscitation , the blood flow of postcapillary venules in male rats appear disorder , showing fast , slow or countercurrent .

北赤道逆流可以分成两部分：25°W以东海区，北赤道逆流常年流向向东，到9月份前后流速达到最大值（约025cm/s）；

The North Equatorial Countercurrent is divided into two parts : East of 25 ° W the countercurrent continued throughout the year , and the maximum average velocity is about 25 cm / s in September .

如果能将原R22装置中的换热器改为逆流形式，从而充分用温度滑移，整个系统的效率将会进一步提高。

If the heat transfer can be changed in reverse flow way , the efficiency of system can be greatly raised .

高速逆流色谱（HSCCC）技术与色谱指纹谱

High-speed Counter-current Chromatography and Finger Print

目的探讨膀胱尿逆流显像对前列腺增生（BPH）所致膀胱输尿管返流（VUR）的诊断价值。

Objective To determine the clinical value of vesicoureteral reflux ( VUR ) imaging in detecting VUR consequent upon benign prostate hyperplasia ( BPH ) .

介绍了爱立许R系列混合机，其结构特征为：旋转的混合盘，逆流式原理下工作的旋转的混合工具和静态的壁部/底部刮板（多功能工具）。

Eirich R series mixer , characterized by its rotating mixing pan , rotating tools and static mixer , characterized by its rotating mixing pan , rotating tools and static wall / bottom scraper ( multi purpose tools ) working in counter current principle was introduced .