The first component are mainly formed by the spot price and copper futures price of LME.

Spot price and futures price trade for the market provided main basis.

现货价格与期货价格为市场交易提供了主要基础.

Resistance spot welding machine is used in the manufacture of the automobile, airplane, and electrical appliances.

点焊机主要用于汽车 、 飞机和家电制造等方面.

Thermal expansion deformation for resistanee spot welding of low-steel is simulated by an finite element model.

用有限元方法模拟了低碳钢点焊过程的热膨胀变形.

Compared with spot welding of low carbon cold rolled steel , weldability of galvanized steel sheet worsened.

热镀锌钢板与普通低碳冷轧钢板相比,其点焊焊接性能显著恶化.

The potential applications of fractal theory to resistance spot welding is discussed.

介绍了分形理论,探讨了其在电阻点焊中的应用前景.

This paper introduces the design method of a new capacitor stored energy spot welding machine.

介绍了一种新型电容储能焊机的电路系统设计.

Resistance spot welding in aluminum alloy was tested by ultrasonic immersion method with focusing probe.

摘要介绍采用水浸超声聚焦回波检测铝合金电阻点焊焊核直径.

Ways and methods of optimizing resistance spot welding parameters are given.

给出了优化点焊工艺参数的途径和方法.

New robot technique for spot welding used in automobile work is introduced.

介绍了汽车制造厂点焊用新型机器人技术.

It has great interest to establish Expert System ( ES ) for spot welding process.

建立点焊专家系统,对于实现点焊过程的智能化,优化点焊规范参数,降低对操作者的要求,提高点焊质量,具有重要意义.

This paper introduces a single chip computer system used for measuring the spot welding current.

介绍了一种用以检测点焊焊接电流有效值的单片机系统.

An axisymmetric finite element electro-thermo-mechanical model for resistance spot welding process is introduced.

介绍了模拟点焊熔核形成过程的轴对称电、热、力学有限元模型.

We sat, I in the spot on the couch immediately to his right.

我们坐着, 众目睽睽之下我紧挨总统的右手坐在沙发长椅上.

He was laid away in his favorite spot on the hill.

他被安葬于山上他喜欢的地点.

The red spot on his arm is a sting.

他胳膊上的小红点是虫叮的伤痕.

His assessment of the situation was spot-on.

他对形势判断得很正确。

How did you get that spot on your face?

你脸上怎么弄脏了一块?

Your budget figures were spot-on this year.

你做的本年度预算数字十分准确.

a spotless white shirt

洁白的衬衣

They lived upstairs in spotless quarters, although the bathroom was in the backyard.

虽然洗手间在院子里, 他们的卧室可是一尘不染.