流体的

The welded pipe products is partitioned into five arrangements as per its characteristics and its six developing directions toward thin wall thickness,thick wall thickness,high accuracy,high grade,inside burr removal and anti-corrosion,etc.are analyzed.

我国中小直径焊管经过20世纪80~90年代的飞速发展，品种结构和应用领域已经有较大的改善，但是低压流体输送管、一般结构管比例较大，与焊管发达国家在锅炉、化工、油井、机械构件、高压流体输送用承压钢管和精密钢管领域不断扩大焊管的使用范围、提高高等级焊管使用数量方面存在一定的差距。

Under the influence of increase in temperature with depth, the fluids are heated and the intraformation pressure is anomalously increased.

在随深度而增高的温度影响下，流体被加热，并且建造内的压力异常增大，因而加热了的流体穿透到断面的较高水平。

In connection with residual oil film of different forms after water flooding on the oleophilic rock and the viscoelasticity character of the polymer solution,the Upper-Convected Maxwell constructive equation of viscoelastic fluids was choosed,the model was analysized numerically by using computation fluid software-Polyflow.

针对亲油岩石水驱后残余油膜的存在形式及聚合物溶液的粘弹特性，选取粘弹性流体中的上随体Maxwell本构方程并使用计算流体软件Polyflow对模型进行数值分析。

From the viewpoint of energy efficiency of cooling towers and underground thermal balance, recommends the operating mode by setting the average water temperature of buried exchangers or by setting the difference between the water temperature of buried exchangers and the wet-bulb temperature of environment.

从冷却塔运行节能及地下冷热平衡的角度考虑，建议采用设定地埋管换热器流体平均温度或设定地理管换热器流体温度与环境湿球温度的差值的控制策略。

The δ〓O for both of them are changed due to water/rock interaction at water/rock weight ratios of larger than 0.1, and the calculation indicates that, in this case, the influence of water/rock interaction on the δD value of the fluid is minor. In the upper part of the geothermal system, the upward ore forming fluid mixes with low temperature groundwater with very low salinity and δ〓O, which may cause the precipitation of metals.

根据氢、氧同位素研究结果，嵩溪银锑矿床的上升成矿流体是由岩浆热液与循环地下水热液混合而成，这种混合成因含矿热液上升到地热系统上部与低矿化度、低δ〓O的低温地下水发生了不均匀混合，这种混合作用导致金属矿物沉淀，但成矿物质是由上升成矿流体带来的。

The mixing power and circulation characteristics of Newtonian fluid and pseudoplastic fluid were measured in a φ300mm organic glass vessel,by using anchor and tri-leaf impeller,anchor and inner-outer screw,orthogonal twi-stratm triangle blades and single screw,orthogonal twi-stratum triangle blades and inner-outer screw types of combined agitators.

为使聚合釜内搅拌介质在湍流、过渡流及层流域都能达到良好的混合，对锚－三叶推进器、锚－内外单螺带、正交双层三角桨－单螺带、正交双层三角桨－内外单螺带等4种组合桨搅拌器，于φ300mm的有机玻璃釜中，测定了在牛顿流体和假塑性流体中的搅拌功率和循环特性。

According to the theory that the shape of seal rock control petroleum to migrate along with ridge, ray-tracing technique is adopted to forward hydrocarbon migration pathway. This technique advanced fluid potential by combining source sag and energy field.

东部凹陷中段为一常温常压盆地，运用流体势分析油气运聚意义不大，根据封闭面底部形态控制油气脊运移原理，本次研究采用射线追踪技术正演油气运聚路径，该技术基于油气二次运移的相对能量行为进行油气运移路径的三维分析，将生烃凹陷与能量场结合起来，是对流体势分析技术的重要改进。

Based on the theory of the conservation law of mass, the Darcy law and the conservation law of energy, the author designed a procedure using finite element method to calculate velocity field and temperature field of the Youjiang basin during the Yanshan period.

1以物质守恒定律、达西定律和能量守恒定律为理论依据，采用有限元数值计算方法，设计编制了计算地形驱动的流体流动和热传输的计算机程序，用来计算右江盆地燕山期地形驱动流体系统的速度场和温度场。

There is little difference in viscosity for bio-diesels when the temperature is higher than the phase change temperature of bio-diesel.

在较低的剪切速率范围内表现为典型的非牛顿流体行为，而在较高的剪切速率下则表现为牛顿流体行为。

The concentric tapered pipe/reducing socket is advantageous to the fluid flow, in changes the diameter time is small to the fluid fluid state's disturbance, therefore the gas and vertical mobility's liquid pipeline use concentric tapered pipe changes a diameter.

同心异径管/大小头有利于流体流动，在变径的时候对流体流态的干扰较小，因此气体和垂直流动的液体管道使用同心异径管变径。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。