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The effects of single aging,duplex aging and conditions between the first and second step agings on the microstructures and properties of the extruded plate of 7050 aluminium alloy were investigated,by means of TEM,tensile and conductivity tests.

采用力学性能和电导率测试及透射电镜组织观察的方法，研究了7050合金挤压带板的单级时效、双级时效及两级时效之间处理条件对合金组织和性能的影响。

Gray metal with high tensile strength. It is ductile, malleable, and resistant to atmospheric elements and all acids except strong alkalies.

钨是一种耐压强度较高的灰色金属，延展性很好，可以抵抗大气和所有除强碱外酸性物质的腐蚀。

It is recommended that anodes be not fitted to face plates of higher tensile steel longitudinals.

例 1：建议阳极尽可能不装在高强度钢纵骨的面板上。

Kevlar 49 is an aromatic polyamide fiber with a high modulus anda high tensile strength, It has become very popular for a variety of applicationranging from body armours to aircraft structuval parts.

一、前言 Kevlar纤维是一种高强度、高模量、低密度、低成本，又具有良好化学稳定性和耐热性的有机纤维。

There is no serious selective corrosion in the bainite steel for the corrosion has little effect on its tensile mechanical properties.

在三种环境中的腐蚀对钢的拉伸力学性能的影响较小，说明没有产生严重的局部腐蚀。

In Chapter 3, problems of cavitated bifurcation for a solid sphere composed of imperfect incompressible hyper-elastic materials, subjected to a surface tensile dead load, are examined.

由于材料内部空穴的生成、增长以及相邻空穴的贯通是材料损伤和破坏的重要机理，因此如何预测材料内部的空穴生成和增长引起了广泛关注。

It is pointed out that the critical stretch of the sphere composed of the first kind of materials given in this chapter is less than that for the perfect materials. Finally, stability of solutions of the cavitated bifurcation equation is discussed. 3. In Chapter 5, problem of radial motion for a solid sphere composed of an imperfect incompressible hyper-elastic material, subjected to a surface tensile dead load, is examined.

第四章中，分别研究了两类具有缺陷的可压缩超弹性材料球体在表面均布的径向拉伸作用下的空穴分岔问题，得到了两类材料球体的径向变形函数的参数型解析解和参数型空穴分岔解，同时指出了本章中给出的第一种缺陷材料组成的球体与无缺陷材料的相比会提前发生空穴分岔。

In Chapter 3, problems of cavitated bifurcation for a solid sphere composed of imperfect incompressible hyper-elastic materials, subjected to a surface tensile dead load, are examined.

证明了空穴分岔方程的平凡解支上存在唯一的分岔点；给出了左分岔和右分岔的判别条件，并指出了向左分岔的空穴分岔解还会发生二次转向点分岔。

By these methods, the tensile propriety of the cohesive clay was studied on two kinds of cohesive clays.

并使用这五种测试方法对两种粘性土的抗拉特性进行了全面的研究。

It's usually fastened with clips and nails to a metal frame of certain size used for seats or beds; Compared with unstable elastics, it is tensile and flexible with high endurance; moreover, it largely increases the comfort of products. That's why it is widely used in furniture industry.

它一般用平钩和螺丝安装在一定大小的铁架上，作为整个座椅或者床的一部分；与其他产品相比，S簧具备更强的的伸张力、弹性和更久的疲劳性能，并且极大地增加了底座的舒适度，这就是为什么它会成为家具行业的首选配件的原因。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。