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Inside the chamber, the base pressure can be lowered to 6.4×10~(-6) Pa, and the total leakage and outgassing rates in 12 hours is below 1.5×10~(-8) Pa·m~3/s.

通过真空清洗和必要的加热处理,目前真空室的本底压强可达到6.4×10~(-6) Pa,12小时内的总出气率小于1.5×10~(-8) Pa·m~3/s。

According to several domestic and foreign earlier works as reference,some technical problems in the design of vacuum systems for external refining equipment of molten steel are discussed,such as how to make certain of the outgassing rate,equivalent conversion of gas loads,selection of capacity of vacuum pump s and energy/power consumption.

本文综合一些国内外有关资料,讨论了钢液炉外精炼设备真空系统设计中的一些技术问题,对放气量的确定、真空系统的气体负荷的等效换算以及真空泵容量的选择和能源消耗等进行了分析。

A mathematic model was developed to describe how the process of surface outgassing affects the vacuum degree in a minisized container with the pressure boost formula calculated.

建立数学模型描述了材料表面放气对容器内部真空度的影响,进而推算出容器内部真空度的变化规律。

Functions in a weak external field like the pion or electromagnetic field, which polarizes the otherwise-with-no-Lorentz-structure QCD vacuum, induces new condensates and affects the propagation of quarks and gluons in the vacuum.

外场的存在,将使原来没有 Lorentz 结构的 QCD 真空极化,诱导出一些新的凝聚量,另一方面外场的存在将改变夸克在真空中的传播行为,并且需要增加一些唯象参量。

Installation of retrofits is allowed by Seiler Vakuumtechnik GmbH only or with written authorization by Seiler Vakuumtechnik GmbH.

对设备的翻新只能由赛乐真空技术有限公司或经赛乐真空技术有限公司书面授权才可以进行。

To do this, the sample is first isolated from the vacuum by means of the taps, the vacuum over the sample is then replaced with an inert gas and can then be stoppered and removed.

为了做到这点,首选将样品与真空用阀门隔开,然后将样品上面的真空用隋性气体代替,然后塞上塞子移走。

The methods of extracting and refining tellurium presently were mainly soda roasting,autoclaving in general basic solution,sulfating roasting,oxidative leaching in acid solution, solvent extraction ,emulsion liquid membrane,microbial method,electrorefining,vacuum distillation and zone melting etc.

目前分离提纯碲的方法主要有苏打粉焙烧法、碱性高压浸出法、硫酸化焙烧法、氧化酸浸法、萃取法、液膜法、微生物法、电解精炼法、真空蒸馏法、区熔精炼法等,其中电解精炼法得到的碲的纯度达到99.99%,真空蒸馏碲的纯度达到99.999%,区熔精炼碲的纯度可达99.999995%,本文综述了以上分离提纯碲的方法。

Firstly, by the data measured from field test, it was analyzed the characteristics and effect in reinforcing soft foundation with vacuum preloading method in which there is underplayed confined aquifer and sand.

首先,总结了真空预压现场试验监测成果,结合本工程有部分打穿下卧承压含水层及普遍存在夹砂层的特点,分析在此情况下,利用真空预压法加固软基的工程特性和效果,为以后类似工程的设计、施工工艺改进、机理研究和数值模拟等提供参考。

We have had some wonderful vacuums and I have always been under the impression that you need to spend a lot to get a good vacuum.

我们已经取得了一些精彩的真空,我一直的印象是,你需要花很多获得良好的真空

The existing determining method of the optimum vacuum of condenser is only fit for the condition of that condenser is clean in tubes and vacuum system tightness is up to standard or the performance of air ejector is normal.

现有的凝汽器最佳真空的确定方法只适用于凝汽器水侧管壁清洁、汽轮机真空系统严密性正常或抽气设备运行性能正常的工况。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。