set copper

Copper prices hit record highs last week, becoming the first industrial commodity to break above levels set in 2008.

上周铜价达到历史新高，成为第一种价格超过2008年水平的工业商品。

Both self-lubrication material spiral surface with oil grooves were molded integrally. A screw-transmission efficiency test set was developed. The friction property of the copper nut and the composite nut under different conditions were tested and compared.

自行研制开发了螺旋传动效率测试装置，模拟重载螺旋副工况，对比了铜螺母与复合材料螺母在不同状态下的摩擦特性。

Operational patterns are used to describe a set of on-line operational parameters which need to be determined on line, and an intelligent method based on neural network combined with improved chaotic genetic algorithm for optimal operational patterns is proposed to improve the operational level of copper converting furnace.

为了提高铜转炉的操作水平，采用操作模式来描述一组需要在线决策的一组操作参数，提出了基于神经网络和带混沌变量的混沌遗传算法的铜转炉生产过程操作模式智能优化方法。

This gold-plated copper commemorative medallion set includes 5 pieces , each of a diameter of 40 mm.

此套纪念章为铜质镀金, 直径40毫米,共5枚.

Select water-cooled copper mold and graphite crucible as the reaction vessel, and set different welding current and duration of preparation.

氩弧熔化时分别选用水冷铜模和石墨坩埚做反应容器，设置不同的焊接电流和持续时间。

Continuous Extrusion Research Center of Dalian Jiaotong University, through secular hard research, has exploited successfully the integrated set of continuous extrusion equipment of copper.

大连交通大学连续挤压工程研究中心，经过多年的努力研究，成功地开发出了铜连续挤压的成套设备。

Based on the above two points, wo set our goal to study the copper and aluminum surfaces.

基于以上两点，我们把研究目标定在了铜铝表面上。

And then set up paper processing is mainly copper-colored paper processing specialty paper.

而后又组建纸品加工主要是铜板纸加工成各色特种纸.

This gold-plated copper commemorative medallion set includes 5 pieces , each with a diameter of 40 mm.

此套纪念章共5枚,材质为铜质镀金, 直径40毫米.

It also describes the result of bismuth removal, and points out the technical measurement to reduce effect of Bi on copper cathode quality and the necessity and method to set up Bi removal step.

评述了提高脱铋效果，降低铋对阴极铜质量影响的技术措施；指出建立脱铋工序的必要性及途径。