查询词典 lead-chamber process

It is available to carry out numerical simulation and fluid dynamic analysis further. Based on Frozen-Rotor Approach and Rotor-Stator Approach, the numerical simulation was carried out in the centrifugal pump and the numerical results showed that the flow in the impeller and volute of centrifugal pump is periodically unsteady. Due to the interaction between impeller and volute the flow is characterized by pressure fluctuations and it is the strongest at impeller outlet and at the vicinity of the tongue. The unsteady pressure fluctuations are also one of the most important reasons to induce vibration and noise. Secondly, the flow field of the volute is characteristic of the vortex flow, and the vortex flow presents very complicated developing process which is creating, increasing and dissipating every now and then. All these lead to very large flow loss in the volute.

采用Frozen-Rotor冻结转子模式和Rotor-Stator滑移界面模式系统开展了不同工况下离心泵内叶轮与蜗壳耦合的定常和非定常流动研究，结果表明由于叶轮与蜗壳的干扰蜗壳进口周向流动的不均匀性是非常强烈的，特别是叶轮与蜗舌间的相互干扰最为强烈，一直影响到叶轮进口和蜗壳扩散管出口的流场；在蜗壳内整个流动是以旋涡形式向出口推进的，并随着包角的变化旋涡表现出十分复杂的产生、发展和耗散的演化过程，导致蜗壳内较大的流动损失。

But a breeding program to obtain low-caffeined tea plants would probably take 20 years or more, and the developed tea species may not suit for processing high-quality tea. Using supercritical fluid extraction in the process of tea would lead to the lost of the volaties and other functional compounds.

但是，通过常规育种的方法选育低咖啡碱茶树品种，至少需要20年左右，而且选育出的茶树品种不一定能适制多种多样的茶叶和茶饮料：加工过程中用超临界萃取法去除咖啡碱会严重影响到茶叶品质，尤其是茶叶香气和滋味。

Through studying mechanism of drilling string failure in the action of interaction of cyclicstresses and corrosion, we find fracture source is accord with pitting corrosion inside surface ofdrilling string, crack from pitting corrosion lead to drilling string failure, the process of drillingstring failure is new drilling string → corrosion pit forming and crack initiation → corrosionfatigue crack propagation→piercement or fracture.

通过研究在钻柱交变应力和腐蚀的交互作用下的机理发现，腐蚀疲劳裂纹源与钻杆内壁蚀坑对应，蚀坑萌生裂纹造成钻柱失效，钻柱腐蚀疲劳破坏过程归结为：新钻杆—蚀坑形成及裂纹萌生—裂纹扩展—刺穿和断裂。

Finally, the current status problems and challenge of agro-informatization in China are studied and the countermeasures to accelerate the process of agro-informatization are brought forward, that is, strengthening the constructionof agricultural information infrastructures and service networks; developing resource of agricultural information; attaching importance to applied system of agricultural information; fueling construction of agricultural information service system; reinforcing lead ship and strengthening guarantee measures.

文章最后分析我国农业信息化的现状、问题及制约因素，并提出相应的发展对策：加强农业信息基础设施和服务网络建设；大力开发和利用农业信息资源；重视农业信息应用系统的研究和开发；积极推进农业信息服务业的发展；切实加强领导，强化保障措施。

But the use of Sn/Pb alloy solder is one of the important sources of pollution in manufacture and use of Sn/Pb solder process, because of the melting temperature is higher, there are lots of lead steam escaping, will directly affected operation personnel's physical health.

大量使用的Sn/Pb合金焊料正是造成污染的重要来源之一，在制造和使用Sn/Pb焊料的过程中，由于熔化温度较高，有大量的铅蒸气逸出，将严重影响操作人员的身体健康。

The company's chemical fiber spinning machine Central briefing system and accessories, with its unique design and manufacturing process technology to domestic and international level or lead.

本公司生产的化纤纺丝机环吹风系统及配件，以其独特的设计工艺及制造技术达到或领先国内外水平。

The results show that with the increase of strain rate, the grain sizes of thermal simulation AZ31B alloys with different deformation all decrease; however, when other conditions are the same, the higher deformation will lead to the formation of the smaller grain size, and as the cooling intensity decreases, typical cast structure of AZ31B will appear. With the decrease of roll casting temperature, the dendritic size of roll casting AZ31B alloy sheet prepared by the same strain rate is also reduced, but with the increase of strain rate, the dendritic size of the alloy sheet prepared by the same initial roll casting temperature is decreased, and the tendency of dendritic streamline is strengthened. During the roll casting process of AZ31B alloy, rolling force should not be large, otherwise it will cause heat cracking.

研究结果表明：在不同应变量下，热模拟样品的晶粒粒度均随应变速率的增加而减小，而当其他条件相同时，变形量越大晶粒粒度越小，冷却强度降低，合金呈典型铸态组织；利用铸轧技术生产的AZ31B合金，当应变速率一定时，随着初始铸轧温度的降低，铸轧态板材的树枝晶粒度逐渐减小；而在初始铸轧温度一定时，随着应变速率的增大，铸轧态合金板材的树枝晶粒度也逐渐减小；而随着应变速率的提高，树枝晶沿轧向呈流线状排列的趋势增强；在AZ31B合金铸轧过程中，轧制力不能太大，否则容易引起热裂。

The floatation process of a multi-metal sulfide ore from Anwang Silver-lead Mine in Shaaxi,China,is investigated.

研究陕西省山阳安旺铅银矿多金属硫化矿石浮选工艺。

In order to study the permission quantity of heat transfer from high temperature smoke in the process of zinc refining in lead column, a control model was established based on the law of mass conservation and the law of energy conservation.

为了研究铅塔锌精馏过程中高温烟气供给塔盘的允许传热量，基於质量守恒和能量守恒定律，建立了铅塔锌精馏过程高温烟气供热控制模型。

3The product accepts to lead while making to join the measuring of oil of vitriol as 0.4 mls in the process of crocic acid the most ideal.

制备克酮酸的过程中加入浓硫酸的量为0.4ml时，产品收率最理想。

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％。