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The junction technique of composite plastic pipe was researched, and the application of electrofusion welding in junction technique was discussed in detail.

对复合塑料管的连接技术进行了研究,尤其对连接技术中电熔熔接的应用做了详细的论述,提出了电熔熔接时恒压及动态过程控制的方法和控制的参数,推导出了电熔熔接电压的计算公式,有效解决了接头连接施工中存在的问题。

The microstructure feature of the copper wire and the melted bead and trace in several condations of simulated test were analyzed in this paper.

用SEM观察分析了在各种模拟实验条件下铜导线及其熔珠熔痕的几种显微组织结构特征,结果表明:单股粗铜导线的火烧、二次短路熔珠熔痕与一次短路、过负荷、接触不良造成的熔珠熔痕其显微结构有明显不同,可为火灾原因的鉴定提供参考依据。

The results show that it is certain that the fire disaster cause is the first short circuit when there are branch crystal and columnar crystal in the microstructure of aluminium wire melted bead and trace in the fire disaster.

用扫描电镜观察分析了各种实验室模拟火灾条件下铝导线及其熔珠熔痕的显微组织结构特征,并和火灾现场取样的组织结构相比较,结果表明:当火灾现场取样结果显微结构出现树枝晶和柱状晶时,能基本判定火灾原因为导线一次短路所致;但当取样结果显微结构仅主要出现大块再结晶体时,则需根据现场情况具体分析。

The weld penetration extent was described by 3D information on the surface depression of full-penetrated weldpool.

利用所建立的TIG(钨极惰性气体保护电弧焊)焊接熔池形态瞬时行为的数学模型,对准稳态情况下当焊接工艺参数发生突变时熔透熔池表面下塌变形的动态演变过程进行了数值模拟,得出了指导焊接熔透控制系统设计的基础数据。

Practice of Jinfeng Copper Co.Ltd. both side-blown bath smelting production;

金峰铜业有限公司双侧吹熔池熔炼的生产实践

The paper describes the features of bath smelting of lead sulfide concentrate and structural characteristics of the oxygen side-blown direct lead smelting furnace.

论述了硫化铅精矿熔池熔炼的特点以及氧气侧吹直接炼铅炉的结构特征。

　The volatility of antimony and tin was compared and, the feasibility, mechanism and process characteristic of treating low-grade antimony ore by bath smelting-continuous fuming process were discussed as well.

比较了锑、锡的熔炼挥发性能，论述采用熔池熔炼－连续烟化法工艺处理低品位锑矿的可能性、反应机理及工艺特点。

This paper present a new fuse blowing method which blow fuse exactly and effectively based on the traditional method.

通过寻找实际测量结果和对应熔断熔丝之间的规律,将数量级为2n的熔丝熔断分析缩减至n次熔丝熔断分析。