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A new anchorage system for girder to obtain pretension stress at section top-edge in middle of span is shown. Based on the research of bi-prestressing beams inside test-room and the test of the prestress bar character, method for calculating the full size gird and choosing section are proposed. A new-style corrugated pipe which is shown in the paper is used, to solve the transformation of compressed thread bar and the contradiction between loss of friction resistance and pumping in pipe.

本文通过大量的试验及研究分析，提出了双预应力梁跨中上缘获得预拉应力的新的传力锚固体系；通过对室内双预应力混凝土小梁的研究，检测了预压钢筋的受力性能和预压过程中的某些影响参数；提出了足尺梁计算方法和截面、跨径选择方法；研制了新型哑铃型波纹管，很好地解决了预压钢筋变形、摩阻损失和管道压浆之间的矛盾；通过对30？

"Later airplane design was affected by the development of the jet engine; most airplanes today have a long nose section, swept-back wings with jet engines placed behind the plane's midsection, and a tail stabilizing section."

后来飞机设计受喷射发动机的发展影响，大部分现代的飞机有一个长鼻机身，向后斜的机翼带有喷射发动机安置在飞机中段部分，尾部是安定器。

"Later airplane design was affected by the development of the jet engine; most airplanes today have a long nose section, swept-back wing s with jet engines placed behind the plane's midsection, and a tail stabilizing section."

后来飞机设计受喷射发动机的发展影响，大部分现代的飞机有一个长鼻机身，向后斜的机翼带有喷射发动机安置在飞机中段部分，尾部是安定器。

Long- short axis is one of the most simple, prompt and operational methods among the limited deformation methods in outdoors. It requires studies as a circular section or circular section of strain ellipsoid and normal distribution before their deformations .

摘 要：岩石有限应变测量的方法较多，相比之下，&长短轴法&最简单、快捷，野外易于操作，但是对所选的对象变形前要求近圆形，或者椭圆形，且随机分布。

Long-short is one of the most simple, prompt and operational methods among the limited deformation methods in outdoors. It requires studies as a circular section or circular section of strain ellipsoid and normal distribution before their deformations.

岩石有限应变测量的方法较多，相比之下，&长短轴法&最简单、快捷，野外易於操作，但是对所选的对象变形前要求近圆形，或者椭圆形，且随机分布。

The distributions of stresses and strains on the section of strengthened beam are analyzed. The different formulas for the calculation of internal forces of section are deduced according to the different development stages of strain and a flow diagram for the calculation is established. With the program based on the diagram, the internal forces and some relevant parameters of the strengthened beams are calculated and the main factors which affect the ultimate bearing capacity of the beams are discussed.

分析中，着重研究了加固梁的截面应力、应变分布特点及可能出现的变化情况，给出了截面应力合力的计算公式并给出了计算框图，依据框图编程对影响加固梁正截面承载力的相关变化参量进行了计算分析并对影响极限承载力的主要因素进行了分析讨论。

The invention discloses a device for spreading machine docking with trucks, which consists of damping mechanisms installed on both side between the spreading machine and the roller; the damping mechanism consists of side plate 1, sliding block 2, flexible element 3, and shaft 4, the flexible element 3 is sleeved on the shaft 4 of which one end linked with spreading machine and the other with sliding block 2, side plate is on upper section of sliding block 2 and fixed on the machine, lower section of sliding block is linked with roller.

本发明公开了一种摊铺机与卡车对接缓冲装置，它为设置于摊铺机机身前端与推滚之间的左、右各一副阻尼机构(10)；所述阻尼机构(10)包括端板(1)、滑块(2)、弹性元件(3)和轴(4)，弹性元件(3)套于轴(4)上，轴(4)的一端与推铺机机身(5)相连，滑块(2)与轴(4)的另一端相连，端板(1)位于滑块(2)上段之外，并固定于推铺机机身(5)上，滑块(2)的下段与推滚(6)相接。

Ray tracing method is used to calculate the spot pattern for different lens section plane,and then lens section plane of available dielectric material is optimized to reduce aberrations,so as to expand the field-of view.

采用射线追迹方法计算不同透镜剖面成像系统焦面上的点列图，对商用介质材料透镜通过优化剖面形状来减小像差从而获得视场扩大的效果。

I can see her news both in the sports section and the entertainment section of the newspaper.

在报纸的体育和娱乐板块都可以看到她。

There's the news section, the entertainment section, sports, business, and world affairs.

B：我看看。有新闻、娱乐、体育、商业和国际时事。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"