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A change in single-screw pump suction valve opening degree, when the suction vacuum is small, pump parameters changed little, and when the suction vacuum is larger, the pump working conditions deteriorated dramatically.

改变单螺杆泵吸入口阀门开启度，当吸入口真空度较小时，泵特性参数变化不大，而当吸入口真空度较大时，泵的工作状况急剧恶化。

In order to meet the need of economic development for large-specification roll of steel plates, technical improvements have been carried out in the hot-rolling mill. The six sets of high pressure water pump, which cannot provide high enough speed of water supply for rolling, is replaced using three sets of high pressure centrifugal pump. The working mode of three sets of high pressure centrifugal pumps is that two pumps work and another one is spare. After the project has been carried out other problems emerge, for example, the electromotor becoming very heat and the pump being frequently attainted.

为了适应经济发展对轧制大规格的热轧板卷的需要，热轧板厂对轧线进行了技改，将6台不能满足快节奏高速轧制供水的高压柱塞泵更换为3台高压离心泵，三台高压水泵采取两用一备工作状态，投运以来，又出现电机严重发热，泵频繁损坏的问题。

In addition, on the basis of introducing systematic principle of water- loop heat pump, have distinguished and analyzed to some several concepts fuzzier and easier to obscure in using, the conclusion is that water- loop heat pump belongs to the air- source heat pump in fact.

此外，在简单介绍水环热泵系统原理的基础上，对一些在使用中比较模糊和容易混淆的几个概念进行了区别和分析，并得出水环热泵事实上应该是一种空气源热泵的结论。

This article introduces the structure, principles and performance of several low-noise gear pumps, analyses that gear pump is the noise source in the new internal combustion forklift and battery forklift, provides some methods which can reduce the gear pump noise, and establishes the matching relation between gear modulus and pressure angle of the gear pump, which is applied to the new internal combustion forklift and forklift battery.

摘 要：本文介绍几种低噪声齿轮泵的结构、原理和性能，分析了新型内燃叉车和电瓶叉车中齿轮泵是噪声源，给出了可降低齿轮泵噪声的方法，建立了该种齿轮泵的齿轮摸数和压力角匹配关系，并在某新型内燃叉车和电瓶叉车上得到应用。

Used the finite element method computation pipe network resistance thus obtains the ballast water system the line pressure distributed situation. The paper also has carried on the computation to the ballast tank hydraulic loss and has provided the theory basis to the ballast pump optimized design. The overpressure to the ballast tank has been carried on the discussion. The paper also gets the function between the rated flow and the rated pressure of the pump on ships whose BW pipe net is uniform and line is different, which provides a new method for the selection of BW pump.

文章重点讨论了船舶压载水系统的水力计算，使用有限元法计算管网阻力从而得到压载水系统的管路压力分布情况；文章还对压载舱的水力损失进行计算，对压载水泵的优化设计提供了理论依据；文章还对压载水舱过压问题进行讨论；文章对压载水系统相同而航线不同的船舶，利用最小二乘法得到其压载水泵额定流量和额定压头之间的函数关系，为压载水泵的设计和选型提供了新的方法。

In the original ballast promotes the pump house CompactLogix control system and east auxiliary constructs in the area pump house ControlLogix control system's foundation to use the ControlNet networking, through RSLogix 5000, RSVIEW32 software's establishment, the edition, realizes the ballast to promote the pump house the remote control, achieves the enhancement production efficiency, convenient equipment monitoring, maintenance goal.

摘 要：在原压舱水提升泵房CompactLogix控制系统和东辅建区泵房ControlLogix控制系统的基础上使用ControlNet网络技术，通过RSLogix 5000、RSVIEW32软件的设置、编辑，实现压舱水提升泵房的远程控制，达到提高生产效率，方便设备监控、维护的目的。

Our products include EM、HT series Diesel Fuel Injection Pump Test Bench, Common Rail Injector Test Bench, EDC Electronic Tester, Diesel Electronic Monomer Pump Test Bench, Nozzle Tester, Tools for pump and so on.

公司拥有雄厚的技术力量、先进的设备和科学的管理经验，同时还与国内多家专业院所和著名的学府合作，并积极引进国外先进的技术、工艺和主要元器件以提高产品的质量和档次。

It can be used alone, but also as a booster pump, the proliferation of pumps, pump-pump using the former.

它可以单独使用，也可作为增压泵、扩散泵、分子泵的前级泵使用。

Vacuum booster pump mainly by the pump, rotor, slide, pump cover,...

真空助力泵主要由泵体、转子、滑块、泵盖、。。。

CRT as a booster pump and transfer pump sea water treatment and other abrasive liquids, reliable performance, and in the industry with the most extensive product line, flow up to 2200 l / h, pressure head of up to 250 meters ( specially designed high-pressure pump up to 450 meters).

CRT泵在作为增压泵和传送泵处理海水和其它磨蚀性液体时，性能可靠，而且在该行业中具有最广的产品系列，流量最高可达2200 l/h，压头最高为250米（特制的高压泵可达450米）。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。