压紧的

Also calculated are dynamic heat transfer characteristics in the fuel rod under different pressure and it is found that we can use the temperature raising speed at x=14.5 cm to calculate helium pressure in the fuel rod.

通过用RODTRAN程序计算各种不同压力情况下的燃料棒动态传热特性，发现利用x=14.5cm处的包壳表面升温速率可以推算燃料棒内的氦气压力，氦气压力的测量精度可小于5％，也就是说可以区分1.9MPa和2.0MPa的压力差别，此时的最大温差可达0.5℃，同时也发现压紧弹簧段的温度响应比铀芯块段要快。

Composed of glacial ice is a longer period of time pressed through the snow, freezing, re-crystallization process of the formation of a series of ice the lower body has a certain plasticity, in its own pressure and gravity Next, along the valley slope or flow slowly, thus the formation of a glacier.

组成冰川的冰体是由积雪经较长时间的压紧、冻结、重新结晶等一系列过程形成的，冰体的下部具有一定的可塑性，在其自身的压力和重力作用下，沿斜坡或谷地缓慢地流动，这样就形成了冰川。

Therefore it is necessary to research the mechanism of greensand used for high compacted molding methods thoroughly.This subject is one section of the National Natural Science Foundation subject ""Ivestigation on Predicting Method and Mechanism of Springback for High Compacted Sand Molds"", followed of the other completed one named ""Research on Microdeformation of Molding Sand"". A serious of experiments has been done on the reequipped three axial machine under certain technological conditions, and the mechanics, material science, rheologic science. It is systematically studied that the influences on the springback of sand mold were caused by the main influence factors: pressure, compacted rate and the content of soil. Through the analyzed experiments' data, the experienced stress-strain relationship concerning the main influence factors were obtained;under different technical parameter, the springback and spingback's potential energy are compared, the differences and indifferences between them are found out, and the springback's mechanism is discussed;according to the tests' data of YangGuoping coming from Tinghua University, experienced formula of molding sand's springback displacement is induced, the displacement and springback are compared, the margin of error's reasons are analyzed, and they are tested and verified mutually.

本课题为国家自然科学基金项目"高紧实度砂型预测方法及回弹机理的探讨"的一部分，是已结题的国家自然科学基金项目"铸造型砂微变形的研究"的后继，运用力学、材料学及流变学理论，利用改装的三轴仪，在一定的工艺条件下，作了大量系列实验，系统的研究了压实比压、紧实率和膨润土含量对砂型回弹的影响；对实验数据进行了分析和处理，得出了型砂关于压实比压、紧实率和膨润土含量的本构关系的经验公式；把各工艺参数下的型砂产生的回弹量与回弹势能进行比较，找出两者存在的异同点，并对回弹机理进行了探讨；通过清华大学杨国平的实验数据，推导出型砂回弹位移场的经验公式，并与实验测出的回弹量进行比较，分析误差造成的原因，并互相进行了验证。

Adjusting the packing 1 Pump packing (1) continue to hand tighten the squeeze cap nut;(2) after opening the pump, adjust the gland nut, this time to allow a little more leakage;(3) slowly tighten the squeeze cap nut, gradually reduce the leak until the leak to an acceptable level;(4) If the disclosure of a sudden stop, should be back to tighten the gland nut, packing re-adjustment in order to prevent overheating;(5) adjust the leakage rate can reach a steady state.

泵用盘根（1）继续用手拧紧压盖螺母；（2）开泵后，调整压盖螺母，此时截止阀允许有稍多的泄漏；（3）缓慢地拧紧压盖螺母，逐渐减少泄漏，直到泄漏达到可接受的程度；（4）如果泄露突然停止，应回拧压盖螺母，重新调节以防止盘根过热；（5）调节泄漏率达到一个稳定状态即可。

In order to function as a single compression member, the C-sections should be connected at a close enough spacing to prevent buckling of individual C-sections about their own axes parallel to the web at a load equal to or smaller than the buckling load of the entire section. For this reason, Sec.

为了起到单个抗压构件的作用，两段U型钢要贴得足够紧，以避免各段U型钢对平行于筋的自身轴的纵向弯曲——它是自身轴的荷载等于或小于整个断面的临界纵向荷载而造成的。

Why do people have the inspiration to make liquid seals ? First of all, no matter how tight you press the solid seals , they can't fill in those uneven places on the joint face, so gap always exists. But liquid seals can fill in the dent and present good sealing function. Meanwhile liquid seals have stickiness so they have adhesive force to metal adjoining planes, which is helpful to seal. Besides the stickiness of liquid seals is high so they will not move easily, which can ensure the leak tightness.

人们之所以会有液体密封件的灵感，首先是考虑到固体密封件无论怎样压紧，也不能完全填满接合面上的凹凸不平，在界面上总会存有间隙，而液态密封件却能将全部凹陷填平，呈现出良好的密封效果；同时，液态密封件具有一定的粘性，对金属接合面具有一定的粘附力，有利于密封，而且液态密封件的粘度是很高的，很难发生流动，从而进一步保证了密封性。

According to the way of the selection principle , discharge head and V block is selected to clamp the part .Then Computation of the strength is achieved by carrying on through the cutting force clamps .

根据夹紧方式的选择原则选择夹紧元件为压板压头和V型块，然后通过切削力进行夹紧力的计算。

By field and indoor test, the paper measures soil physical property, soilmoisture constant and soil water movement parameter, provides the soil specificgravity , the soil apparent density, the soil fraction, the soil field moisturecapacity, the soil saturated moisture capacity, the soil percent moisture content ofcom germination and seedlings emergence, the corn wilting point, and alsoestablishes the equation of soil water retention curves, the equation of soil waterdispersion coefficient and the relationship between pressure and soil apparentdensity, and so those provides the parameter for numerical simulation.

通过田间和室内试验，测定了供试土壤的物理性质、土壤水分常数和土壤水分运动参数，得到了该土样的比重、容重、机械组成、田间持水率、饱和含水率、玉米种子发芽出苗土壤含水率、玉米凋萎系数，给出了土壤水分特征曲线方程、土壤水分扩散系数方程及土壤容重与土壤压紧力的关系，提供了数值模拟过程中所需的参数。

In accordance with the requirement of technical parameter of super high pressure bend and cold bend specification, the stress at cold bending on the three-roll bend machine was analyzed.

根据超高压弯管技术参数和冷弯工艺的要求，结合超高压管在立式三辊滚弯机上冷弯时的受力状态，运用弹塑性理论分析计算出弯管所用弯矩及弯管的最大压紧力，并据此选用弯管设备，解决了超高压弯管的制造问题。

Enormous kinds of hub in different shapes are fastened and located by the chuck in various ways, such as fastened with external swing pressure plate and internal hook pressure plate (pressure plate to rotate by 90° to facilitate loading/offloading of workpiece), gripped with claw, and fixed positioning and moveable positioning, etc.

轮毂的品种很多，形状差别较大，卡盘的夹紧和定位方式各不相同，有外部摆动压板夹紧式和内部钩形压板(压板可转位90°，便于装卸工件)夹紧式，还有卡爪抱紧式等，有固定定位式和活动定位式等。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。