两管的

The velocity distribution curve by numerical computation near the wall is the same as the Blasius theoretical curve, and it approved that the numerical simulative solution is correct. Obtained the time dependent interface and pressure distribution, but also obtained the time dependent velocity distribution on the cross section. It is a new way to study the gas-liquid two-phase flow.

直接数值模拟圆管中气液两相分层流动不仅能得到相界面、压力分布随时间的变化情况，而且能得到圆管中各截面上速度分布随时间的变化情况，这为研究管道中气液两相流动提供了一个新的研究方法。

Initial research on phase maldistribution of gas-liquid two-phase flow at a T-junction is reviewed.

回顾了气液两相在T形管处流动时对相分离的最初研究及起因，随着研究的进一步深入，T形管作为两相流分离器逐渐受到石油和化学工业界的重视。

The efficiency of preparation and obturation of root canals was analyzed with radiographs before and after operation.

两组均采用侧向加压充填法充填根管，通过术前、术后的x线牙片评价根管预备与根管充填的效果。

The relationship of variation rate between the scan light beam length after passing through the deflector and the fast voltage pulse wasderived.

导出激光束通过偏转器后扫描光线长度与加到偏转器上的快速电压脉冲变化率关系，并在实验中分别用MOS管和雪崩管高压电脉冲发生器取代价格昂贵的冷阴极管高压电脉冲发生器，获得激光脉冲宽度压缩约两个量级，且实现激光脉冲宽度可调。

Firstly,all patients have been excided the upper ductus choledochus,the liver gross duct,left right liver duct besides one centimeter of liver duct that lies upwards the hepatolith.Secondly, we have sutured the excided bile duct, which has been shaped acetabuliform,lifted one part of jejunums,intered non-port one subcuneously,and then inosculated gall with enteron by Roux-en-Y way.Lastly,we have partly excised the ill liver in regular way.Results 26 ones have been follow-up for 1～10 years.The rate is 81 percents,average for 6 years.

32例肝内胆管结石均接受皮下盲袢型胆肠吻合术，其中结石位于右肝7例（22%），左肝9例（28%），两肝均有16例（50%）；结石合并肝胆管狭窄24例（75%），全部病例均切开胆总管上部、肝总管、左右肝管，并切开肝内胆管狭窄部以上1cm肝管，将切开的胆管做必要的缝合，形成碟状，取一段空肠上提，盲袢埋置皮下，再做胆肠Roux-en-Y吻合，病肝做规则性肝部分切除术。

The analysis shows that: a The classifiable fault styles are mainly two types: one is fault occurs in single bridge arm, the other one is fault occurs in two bridge arms.

故障情况分析表明： a 可分类的故障类型主要包括两大类，一类是一个桥臂上的晶闸管故障，一类是两个桥臂上的晶闸管同时故障。

Objective To analyse the result for entogastricnutrition emulsion to reduce hypoproteinemiaduring early phase in heavy skull injure.Methods Choosed 120 heavy skull injure patients needed entogastric nutrition in our hospital and divided into 2 group (experimental group treated with entogastric nutrition emulsion and control group treated with self-made homogenic plasm)treated in 48 hours for 21 days,then observed the changement of ALB and TP.

选120例需肠内营养护理的重型颅脑损伤患者以不平衡指数最小的方法分为实验组：胃肠内营养乳剂组和对照组：自制均浆膳组，于受伤48 h内分别开始使用胃肠内营养乳剂胃管注入护理和自制均浆膳胃管注入一般常规营养治疗，两种不同营养治疗持续期限均为21 d，观察两组患者血清白蛋白和血清总蛋白的动态变化。

In addition, the test results of frictional pressure drop in smooth tube with water and kerosene are compared with the calculated results with homogeneous model and Friedel formula respectively. By comparison, more suitable calculation formula are recommended for smooth tube.

此外分别研究了两种工质在光管中的两相摩擦阻力特性，将实验结果分别同以均相模型和Friedel经验公式的计算值进行了比较，推荐了适合于光管中摩擦阻力计算的经验公式。

Finally, the experiment equipment was improved and separation characteristics of two-phase vortex tube were studied by conducted experiment.

最后，根据喷嘴形式的分析结果改进实验设备，设计两相涡流管实验流程并进行了相关实验，得到了两相涡流管混合物分离的基本特性。

Methods: One hundred and twenty teeth with curved root canals were randomly divided into 2 groups: 74 curved root canals in group PT were prepared by ProTaper rotary Nickel-Titanium file with crown-down technique, and 75 curved root canals in group SS were prepared by K-files with step-back technique.

选择2005年6月至12月间本院口腔内科行根管治疗的120例患者（120颗牙），随机分为两组：试验组用ProTaper机用镍钛锉及冠根向预备技术预备弯曲根管74个，对照组用不锈钢K型锉及逐步后退法技术预备弯曲根管75个。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。