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     This article describes oil pump (P7 pump) cam contour test, damping delivery valve test and their optimum design with the purpose of reaching high oil feed rate and avoiding abnormal injection phenomena. The modified P7 pump and diesel engine mating realizes high pressure injection and reach Euro Ⅰ emission standard
     本文通过油泵(P7泵)凸轮型线、阻尼出油阀的试验及优化设计以达到高的供油率,避免了异常喷射现象。改进后的P7泵与柴油机配套实现了高压喷射并达到了欧Ⅰ排放标准。
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     The drown oil motor-pump is special device for the oil-Field.
     电潜泵(全称无杆沉没潜油电泵)是一种油田专用采油设备。
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     Because coronary perfusion pressure (CPP) is lower which relates to survival rate in CPR , a novel CPR named as VDVEST - CPR was developed that was inflational vest assisted with enhanced external counter- pulsation (EECP ) during deflation.
     传统心肺复苏成功率不高的原因之一是冠脉有效灌注压(CPP)低,本文提出舒张期辅以增强型体外反搏(EECP)(外周泵)的充气背心(VEST)(中心泵)的新型复苏术(VDVEST-CPR)。
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     Forty cases of acute hemorrhage of upper digestive tract were treated by intravenous injection with losec (Omeprazole), a inhibitor of H+-K+-ATP enzyme or proton pump. The effective rate of rapid stoppage of bleeding was 92. 5%, higher than that of the controlled (70% ) (P<0. 05).
     以H+-K+-ATP酶(质子泵)抑制剂洛赛克(losec)静脉注射治疗上消化道出血患者40例,有效率为92.5%,与对照组有效率70%相比较,差异有显著性(P<0.05)。
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     Objective To study the Changes of erythrocyte membrane Ca2+-ATPase(Ca-pump) activity and intra-erythrocytic Ca2+ and Mg2+ contents in 24 aged patients with cor pulmonale.
     目的观察老年肺心病患者红细胞膜钙-ATP酶(钙泵)活性和红细胞内Ca2、Mg2+含量的变化,初步探讨其发生机制及意义。 方法采用生化方法和原子吸收法测定上述指标,并与非老年肺心病患者及老年健康者比较。
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     Peristaltic Pumps
     蠕动
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     PULSE PUMP
     脉冲
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Studies on injector pump-ultrasonic nebulizer feeding sample system for MPT-AES
      
A newly built injector pump-ultrasonic nebulizer combination feeding-sample system has been designed.
      
Based on the numerical simulation results, the spatial effects of the ionosphere, mainly consisting of the change on electron density (ED) and electron temperature (ET), heated by the high frequency (HF) pump wave have been analyzed quantitatively.
      
Research on the method of cavitations resistance in a piezoelectric pump with 3-dimensional mesh structure
      
The volume valve piezoelectric pump has received increasing attention from many areas because of its different characteristics such as the absence of chemical pollution and electromagnetic pollution.
      
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In two stroke engines having scavenging pump located at the end,the effect of the revolving inertia force of the scavenging pump is sometimes used in conjuction with attached balance weights on the main cranks to balance the centrifugal couple of the engine.Such a method is nothing new and actual examples can be found on engines built by Pyeckuǖ- and Sulzer.But when asked by the students that how should such a problem be tackled in a general way,the author failed to find out any published article dealing with...

In two stroke engines having scavenging pump located at the end,the effect of the revolving inertia force of the scavenging pump is sometimes used in conjuction with attached balance weights on the main cranks to balance the centrifugal couple of the engine.Such a method is nothing new and actual examples can be found on engines built by Pyeckuǖ- and Sulzer.But when asked by the students that how should such a problem be tackled in a general way,the author failed to find out any published article dealing with it.The present article is the result of analysis of the subject by the author.

利用端置式扫气来平衡二冲程发动机的离心力偶,并不是一个新颖的问题,在苏联及瑞士 Sulzer 等厂所制的一些发动机中很早已经使用.不过,这种平衡法的一般解法如何,在文献中尚少论及.笔者在带领同学实习时,曾经碰到过这个问题,后来经过思索及分析,得到了一些概念,本文所要谈的,就是这种平衡法的一般解法.

To obtain an oil-free high vacuum is a problem urgently needed to be solved in many of the present day industries. The backstream sources and radial distribution are investigated with a H-5 type diffusion pump. The variation of backstream with the operating process of the diffusion pump is studied by means of an electrometer balance and some processes are explained as well. It is discovered that vapour transmission along a circular tube obeys exponentiat decay law L and d here stand for the length and diameter...

To obtain an oil-free high vacuum is a problem urgently needed to be solved in many of the present day industries. The backstream sources and radial distribution are investigated with a H-5 type diffusion pump. The variation of backstream with the operating process of the diffusion pump is studied by means of an electrometer balance and some processes are explained as well. It is discovered that vapour transmission along a circular tube obeys exponentiat decay law L and d here stand for the length and diameter of the tithe respectively; n,n0 indicate the vapour density at L and L = 0 respectively andα signifies the oil vapour condensation coefficient on the wall of the tube. The difference between theoretical deduction and the experimental data is only 11%. The oil vapour condensation coefficient on the collecting probe and the secondary reflection from the backstream beam to the back of the probe are measured.

获取没有油蒸汽的高真空是近代很多部门急需解决的问题。利用H─5型扩散 研究了返流的来源及经向分布。应用电表秤装置对返流随扩散工作过程的变化进行了 研究,并解释了部份物理过程。发现油蒸汽沿导管传输呈指数衰减规律,即 L和 d分别是管子的长度及直径,n0是 L=0处的蒸汽密度,n是 L处的蒸汽密 度,α是油蒸汽分子打在管壁上的凝结系数。理论推导与实验结果相差11%。测量了 油蒸汽打在油收集极上的凝结系数及返流油束中二次散射到收集极背面的数量。

The necessary conditions of ultra-high vacuum ionization gauges are briefly reviewed. The design and operation of two types of ionization gauges of pressure range 10-3-10-11 torr made in this laboratory are described. All the electrodes of these gauges can be degassed by resistance heating. They are simple in construction, easy to operate, and of shorter degassing time. No special power supplies are required.

在超高真空范围内使用的电离真空计,要求在使用前将电极进行较彻底的除气,因此最好全部电极都设计为可直接通电加热。本文叙述了两种测量范围为10~(-3)~10~(-11)托级的、可用焦耳热除气的电离真空计(热阴极及冷阴极各一种)的设计原则、实际性能及其改进。这两种真空计都曾在实验室使用两年以上,证明具有一定的实用价值,并可作为离子及代替一般的高真空计使用。

 
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