查询词典 SN

Minor Au element has no effect on the solidification microstructure of the Sn-3.5Ag-0.7Cu alloy.

微量Au元素对合金凝固后的组织影响不大。

First SnCl2·2H2O and SbCl3 were dissolved with ethyl alcohol respectively,then nesa coatings were prepared with different ratio of Sb/Sn sols by different methods as such dipping-coating,spraying and spinning .

将SnCl2.2H2O和SbCl3分别溶解于乙醇中，搅拌至完全溶解，以不同的Sb/Sb混合制备得到溶胶后，分别采用浸渍提拉、喷涂、旋涂工艺制备透明导电膜，并考察了不同制备工艺及热处理温度对膜的厚度、薄膜方块电阻以及对薄膜透光率的影响，运用XRD、SEM、TEM对所制备的透明导电膜进行了分析表征。

More importantly, we also demonstrated that there is an increase of DA neurogenesis in the SN of the MPTP-lesioned mice.

更重要的是，我们的研究也显示MPTP损伤小鼠的黑质中有多巴胺能神经合成的提高。

The maximum principal stress is oriented mainly in a NNW direction in the south and in a NNE direction in the north,generally in a N-S direction.

最大主应力方向在南部以NNW向为主，北部以NNE向为主，总体为近SN向。

Nonclassical multiple bonds exist between the heavy atoms, such as Si, Ge, Sn, etc.

在难以形成经典多重键的重原子之间可以形成一种非经典多重键。

The 11 kinds of surface crack features of round cast billet formed by high casting temperature, mould flux lubricating film un-uniform at billet shell, unstale casting speed, tundish nozzle eccentric, alloy steel cast billet cooling and reheating speed overhigh, deleterious elements Pb,Sn,As,Sb and Bi residual content in steel over standard requirements and mould copper tube shifting,...

叙述了浇铸温度高，保护渣润滑膜不均匀，铸坯拉速不稳定，二冷水不均匀，中间包水口不对中，合金钢铸坯冷却和再加热速度过快及钢中五害元素超标和结晶器铜管偏移等致使圆铸坯表面形成的 11种裂纹的特征及其预防措施。

In this paper, the petrology, mineralogy and geochemistry of basic-ultrabasic volcanic rock, granite and skarn related to the Sn-Cu skarn-type ore and the vein-type ore in Laochang ore field have been researched systematically, some conclusions are summarized as follows:In Gejiu tin-polymetallic district, the middle Triassic volcanic rocks belonging to calc-alkaline basalt-tholeiite serie, mainly consist of pyroxene, hornblende, feldspar, chlorite and phlogopite; All the granites are peraluminous granites related to the Yanshanian collision-orogeny. Laoka granite closely related to the tin-polymetallic deposits emplaced in the post- orogenic.The metal elements show obviously vertical zones with the variety of skarn types in dimensional extension; The occurrence of garnet skarn and diopside skarn alternately developed in the horizontal zones of the contact between granite and carbonatite are mainly related to two factors: one factor is the infiltration metasomatism of post-magmatic hydrothermal solution, the another is the metrical strata of marble and calcic-dolomite developed in country rocks.

本文重点以老厂矿田中的接触带锡铜矿床和脉状矿床为研究对象，采用化学分析、ICP-MS、X射线粉晶衍射分析、电子探针等测试手段，对本区与成矿相关的基性-超基性火山岩、花岗岩、夕卡岩、电气石-石榴石等进行了系统的地质地球化学研究，研究表明：个旧矿区中三叠纪个旧组地层中的火山岩为钙碱性玄武岩-拉斑玄武岩系列，岩石为辉石-角闪石-长石-绿泥石-金云母组合；本区的花岗岩为过铝质花岗岩，主要与燕山期碰撞造山作用有关，锡多金属成矿与形成时代最晚、分异较好的花岗岩关系密切；本区夕卡岩中的有用共生组份随着夕卡岩类型及其矿物组合的不同具有明显的分带性。

Metal fitting High conductivity brass and high elastic phosphor bronze. With Ni or Sn plating.

导电用金属组件采用高导电之黄铜、高弹性之磷青铜，再加以镀镍、镀锡等表面处。

Results The analysis results indicate that the components of the kettle was made up of Cu, Sn and Pb, but the raw material of the kettle＇s body was different from the carrier; and posy was in the kettle; and many kinds of rust cover on the surface of kettle, but the baleful rust was not been found.

结果通过一系列的科学分析表明该青铜壶是铜、锡、铅组成的合金，但是壶体和提梁使用了不同的原料；壶内部有铭文；表面覆盖有多种锈蚀产物，但未见有害锈。

The orientation of horizontal maximum principal stress is about the NS- trending.

水平面内最大主应力的方向基本为SN方向。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。