锡合金

The results indicate that the Sn on the catalyst is present in tetravalence, in alloy with platinum, and in divalence.

结果表明该催化剂中的锡主要有正四价锡、铂-锡合金和正二价锡。

The matrix of these samples was cast and then heated.Distinct interface between the matrix and mottle existed.

样品基体为铸态组织且铸后经过加热；斑纹与基体有明显的界面，斑纹是高锡的铜锡合金，厚度在20～40μm；斑纹主要是由SnO2与Cu41Sn11组成。

A new method of continuously determinating copper and stannum in electroplating solution is stated by oscillopolarography.

建立了交流示波极谱法连续测定镀铜锡合金电解液中铜、锡的新方法。

The reason lies in unable butt fusion between terne plating of the copper-insert surface and lead-tin alloy used for terminal post.

本文针对阀控式铅酸蓄电池极柱铜芯的松动问题进行了分析讨论，通过试验发现铜芯松动的原因在于铜芯表面的电镀铅锡合金层与柱体浇铸用的铅锡合金不能熔合在一起。

The paper describes the process ofφ20mm Cu-Sn alloy wirebar production in continuous casting and roiling process,analyzes the impact of the wirebar s oxygen and tin content distribution on production stability, describes the cold-forming process of contact wire manufacturing by drawing machine,and studies and compares anti-drawing strength and extension capability of it.

介绍了采用连铸连轧工艺生产φ20mm铜锡合金线坯的过程，分析了线坯氧含量、锡含量对生产稳定性的影响。

Its are main the task is to produce welding flux kind product -- the recipe dissolvent that will come from French flounder and metal (lead - stannic alloy or stannum - silver-colored - copper alloy) mix and become, in order to passes drill rod solder will yuan parts of an apparatus is fixed in printed circuit board on.

其首要任务是出产焊剂类产物——将从法国辗转而来的配方溶剂和金属(铅-锡合金或者锡-银-铜合金)同化而成，用以经由过程钎焊将元器件固定在印刷电路板上。

VRLA battery uses lead calcium alloy for grid and lead tin alloy for strap, the COS process more likes soldering, COS of lead-tin strap is difficult and needs flux and tinning.

VRLA电池使用铅钙合金板栅和铅锡合金汇流排，其制造过程更像是钎焊。铅锡合金汇流排铸焊过程须使用助焊剂和搪锡。

Buffing oil, mold nail, soldering tin bar, glass beads, plastic beads, iron accessories, copper accessories dog chain, diamonds, acryl, resinous plastic, crystal glass, lead-tin alloy, zinc alloy, alloy fittings, line fittings and so on

抛光油、模钉、焊锡条、玻璃珠、塑胶珠、铁制配件、铜制配件爪链、水钻、压克力、树脂塑胶、水晶玻璃、铅锡合金、锌合金、合金制配件、线制配件等。

Special metal material and products, such as high-hardness steel plate, copper-coated steel wire, copper-coated aluminum wire, Bi-Sn alloy, Al-Ti alloy, W-Mo alloy, W-Cu alloy, Br-Cu alloy etc.

特殊金属材料，包括超硬耐磨钢板、铜包钢线材、铜包铝线材，及针对特殊用途的合金材料和制品，如铋锡合金、铝钛合金、钨钼合金、钨铜合金、铍铜等。

A new immersion plating process was developed in which copper sulfate and stannous sulfate were used as main salt, with addition of complex, brightener and stabilizer to tin salt.

采用硫酸铜、硫酸亚锡为主盐，加入络合剂、光亮剂、锡盐稳定剂，研究成功了一种新的浸镀铜锡合金工艺。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。