壳

Basaltic underplating has deepened the CMB from 32 km to 42 km. The lower crust beneath Hannuoba consists mainly of two-pyroxene granulites, with minor felsic granulites, noritic granulites, spinel pyroxenites and spinel lherzolites.

该地温梯度线表明，华北克拉通北缘的岩石学壳幔边界很可能位于约42km处，与地震莫霍面近于一致。32-35km处的尖晶石二辉橄榄岩层可能反映了古岩石学壳幔边界的位置，玄武质底垫作用造成岩石学壳幔边界的深移。

Taking Changzhou Gymnasium as example,some emulation calculations of tension construction of cable-supported lattice shells have been analyzed,especially in the analysis of hoop cable tension method.

以常州体育馆索承网壳钢屋盖为例，对索承网壳预应力拉索施工方法中的环索张拉法进行虚拟仿真计算，分析了由于环索连接节点的构造处理及环索张拉点数量的不同对大跨度椭球形索承网壳预应力建立效果的影响，提出了适合该类结构的环索预应力张拉方法。

Dynamic characteristics of Kiewitt cable-supported lattice shells ;2. Stability and static analysis of cable-supported lattice shells ;3. Taking Changzhou Gymnasium as example,some emulation calculations of tension construction of cable-supported lattice shells have been analyzed,especially in the analysis of hoop cable tension method.

以常州体育馆索承网壳钢屋盖为例，对索承网壳预应力拉索施工方法中的环索张拉法进行虚拟仿真计算，分析了由于环索连接节点的构造处理及环索张拉点数量的不同对大跨度椭球形索承网壳预应力建立效果的影响，提出了适合该类结构的环索预应力张拉方法。

Based on the pattern of partial double-layer LICS, different analysis models of nonlinear, linear, rigid joint and pin joint were compared, linear property of double-layer region and nonlinear property of single-layer region was disclosed, and then a nonlinear-linear combine method was put forward with a definite object in view.

针对局部双层叉筒网壳的布局特点，本文对局部双层叉筒网壳进行了非线性、线性、刚接、铰接等多种分析方法的比较，揭示了双层区域的线性性质和单层区域的非线性性质，进而有的放矢地提出了&非线性-线性联合&这种适合局部双层网壳分析的合理、准确、高效的方法。

In order to enhance the stability of single layer dome, Vierendeel dome was presented by employing lattice bar.

为了提高单层网壳结构的稳定性，将格构式压杆引入单层网壳，提出了空腹网壳的概念。

The intermediate frequency elbow piece formation technology basic technological process is: First welds a lateral section is the polygon many leng link shell or both sides seal many leng fan-shaped shells, after the interior flushes the full pressure medium, the serve intrinsic pressure, under the intrinsic pressure function the lateral section by the polygon gradually changes a full circle, ends in a circular link shell.

中频弯管成型技术基本工艺过程是：首先焊接一个横截面为多边形的多棱环壳或两端封闭的多棱扇形壳，内部冲满压力介质后，施以内压，在内压作用下横截面由多边形逐渐变成圆，最终成为一个圆形环壳。

But as for impellers and diffusers, not much research was carried on volutes and their design is still based on traditional one-dimensional method.

但是相对于叶轮扩压器而言，关于蜗壳的研究比较少，并且蜗壳的设计也停留在传统的一维设计方法上，此设计方法不符合实际流动情况，导致蜗壳内流体参数不均匀性的增强，进而影响叶轮和扩压器内的流动，降低压缩机整体性能。

This is done with nut-cracking machines and provides one of the only sources of income for women in the area.

去壳依靠开壳机，开壳的工作对于当地的女性来说，是唯一收入来源。

But the airborne radomes mostly are sandwich shells, the finite element analyses of them deal with various knowledge such as thin shell、 sandwich shell、buckling、free vibration and random vibration theories.

而机载雷达罩多数是夹层壳结构，对它们进行有限元分析涉及到薄壳、夹层壳、稳定性、自由振动和随机振动等多方面理论。

The test results were then independently reviewed by the Society of Automotive Engineers and published as an SAE paper, before the formula was finalised and finally released to petrol stations as New Shell Unleaded, Shell Unleaded 95 and Shell Premium Unleaded petrols.

测试结果，发表在独立审查的汽车工程师学会和一个汽车工程师学会发表论文，在公式最后定稿之前，公布在加油站的无铅新壳牌，壳牌无铅95和壳牌高级无铅汽油

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。