泵

Can be seen, no overload is the essence of the centrifugal pump, pump shaft power curve peak, or shaft power with the increase of flow rate changes are small, relatively flat power curve that axis, so that the pump shaft power in the dead lift off to zero head (that is, from zero flow to maximum flow rate) are less than equal to the original context of the supporting motive power.

可见，无过载离心泵的实质是指，泵的轴功率曲线有峰值或轴功率随流量的增加而有较小的变化，即轴功率曲线比较平坦，使泵的轴功率在关死扬程到零扬程范围内都小于等于原动机的配套功率。

MDP/CQG Magnetic-driving pipeline pumps are designed in magnetic-driving technology, and the vertical pipeline pumps lay the foundation for it, the application of which is to solve the problem of conveying of flammable, explosive, severely poisonous, mordant, precious liquids, the viscosity of which is similar to water, and no solid grains in it, and applied to petroleum, chemical engineering, metallurgy, electric power, deckle, food and pharmacy and so on.

MDP/CQG磁力驱动管道泵是在立式管道离心泵的基础上，应用磁力驱动技术组合设计而成，主要特点是利用磁传动器的外磁钢旋转时，磁力线穿过间隙和隔离套，作用于内磁钢上，使泵轴与电动机同步旋转，无接触地传递扭矩。

This series of diaphragm pump is a latest model now at home.

该系列隔膜泵是目前国内最新颖的一种泵类。

objective:to investigate the therapeutic action of somatostatin in pancreatic leakage after pancreaticoduodenectomy.methods: to collect 100 patients with pancreaticoduodenectomy during 2003～2006,contrast 44 patients use somatostatin after pancreaticoduodenectomy as experimental group,and 56 patients with conventional therapy as control group.results:there were no pancreatic leakage case in the modified group of 44 cases.3 cases complicating pancreatic leakage occurd in control group,and the proportion of pancreatic leakage are different examined by statistic mathord.conclusions:use somatostatin after pd can restrain organism excrete diastase vera,and help anastomotic stoma to concrescent and decrease pancreatic leakage;pancreatic leakage should be treated by different grades,grade 1 can be cured by persistent drainage with somatostatin and nutritional support;grade 2 should be pay more energetic intervention.

作者单位：潍坊医学院，潍坊 261042；潍坊市人民医院肝胆外科，潍坊 261042 目的：探讨生长抑素在胰十二指肠切除术后减少胰漏的作用。方法：收集2003年1月～2006年12月施行pd患者100例，术后应用生长抑素持续泵入病人44例，并与同期施行的pd术后常规应用全肠外营养及抗生素治疗病人56例，结果进行了对比观察。结果：实验组病人44例无1例发生胰漏，对照组56例病人，3例发生不同程度的胰漏，发生率5.3%，统计学比较有显著差异（p＜0.05）。结论： pd后应用生长抑素持续泵入可以抑制胰酶的作用，使胰肠吻合口较好地愈合，从而有效地减少胰漏的发生；胰漏可进行分级治疗，ⅰ级胰漏采用通畅引流为主，同时使用生长抑素和营养支持等治疗多可治愈，ⅱ级胰漏需要积极治疗。

It builds the whole liquid-cooling system mainly by the design of the liquid-cooling decalescence boxes(improve its bottom material from aluminium alloy to pure copper, enlarge its volume, better cooling effects, and strengthen pressurization), by the operations of cooling effect about the heat exchanger worked by its temperature adjustability of the ribs(diffuse the heat fleetly owing to the excellent diathermancy of the material of the ribs ,make effective diathermancy owing to ribs outside areas, and drive the heat of the ribs away by the fans), and by the water pump made up of the piezoelectric ceramic with the excellent performance-no electromagnetism interference, little cubage, little noise, light exterior, light weight, low consume, high flux, replacing the mechanical pump.

在液冷散热器的研究中，主要通过对液冷吸热盒设计不断地改进(使吸热盒底部的材料从铝合金变为纯铜材料，其整个体积有所变大，但其散热效果明显变好，且密封性得到了极大地加强)，综合地运用换热器中肋片的壁面温度调节作用产生的散热效果(肋片材料优良的导热性，快速地扩散了热量：肋片较大的与流体接触的表面积，使传热更加充分，对流热阻大大减小；再利用风扇对肋片上的热量进行吹散)，利用性能优良的压电陶瓷泵(该泵机电性能稳定，具有无电磁干扰、体积小、噪音小、外型轻薄、重量轻、低能耗。、高扬程等优点。)代替机械泵作为驱动源，搭建了整个散热系统。

In the reciprocating pump, the suction valve and exhaust valve is a very important component and is vulnerable parts of their work a direct impact on the limit pressure reciprocating pump, extraction rate, power consumption, as well as the reliability of operation.

在往复泵中，吸气阀和排气阀是非常重要的部件且是易损部件，它们工作的好坏直接影响往复泵的极限压力、抽气速率、功率消耗以及运行的可靠性。

This paper reports results of Tin doped fibre pumped by a semiconductor laser diode as an optical source for methane gas detection. The spectral characteristics of the Tm doped fibre pumped by the 788 nm laser diode is studied experimently and the fibre source is used in a correlation spectroscopy measurement system.

报道了以半导体激光器泵浦掺Tm3+光纤为光源的甲烷气体相关光谱检测系统，研究了788 nm波长泵浦下掺Tm光纤光源的一些光谱特性，并在实验上用这种光源及系统对甲烷气体作了测量。

They can be double-acting duplex pumps or single-acting triplex pumps.

它们可能是双缸双作用泵或三缸单作用泵。

By means of the K-ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed.

针对杆式泵泵简内的流体流动问题，采用湍流模型的K-ε两方程模型和有限元方法，对在一个抽油循环中阀与活塞在几个特定的位置的流体流动进行了建模与计算，具体分析了处于阀道内和同心环状空间中的原油在上下冲程的运动规律。

And with the help of research work above mentioned, maintenance management for dredger will be changed over from Time Based Maintenance to Condition Based Maintenance.

本文的研究工作对提高挖泥船泥泵的技术管理水平具有十分重要意义，为对挖泥船泥泵的技术管理方式由定期维修到视情维修的转变提供了技术手段。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。