金属环

The recent development about applications of ionic liquids to transition metal -catalyzed cyclization of alkyne and enyne compounds was introduced.

概述了离子液体在过渡金属催化炔及烯炔类化合物环合反应中应用研究进展。

Under the conditions of use, valve can be all-metal structure can also be rack mounted in the valve rubber mat or rubber ring form.

根据使用条件，阀瓣可以是全金属结构，也可以是在阀瓣架上镶嵌橡胶垫或橡胶环的形式。

According to conditions of use, the valve flap can be all-metal structure can also be rack mounted in the valve flap rubber mat or rubber ring form.

根据使用条件，阀瓣可以是全金属结构，也可以是在阀瓣架上镶嵌橡胶垫或橡胶环的形式。

Using mordern physical chemistry techniques (such as XRD、 TG-DTA、 IR、 XPS and 〓Xe-NMR)、 chemical adsorption techniques (NH〓-TPD、 H〓-TPD、 TPO、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本论文运用各种近代物理表征方法(XRD、BET、TG-DTA、IR、XPS和〓Xe-NMR)、化学吸附技术(NH〓-TPD、H〓-TPD、TPO、TPR等)和正己烷、甲基环戊烷及含噻吩正己烷的脉冲微反等方法，着重研究了(1)载Pt的β和L沸石在分解预处理过程中发生的变化；(2)沸石载体结构及酸碱性对Pt粒子分散及电子状态的影响；(3)第二金属组份对载Pt沸石催化剂上正己烷芳构化及抗硫性能的影响等，得到了某些有意义的结果。

You need to attache it to the centre as it is now, but also attach it next to the first eyelet.

你应当像现在这样把它车/缝/固定在中央位置并且应当靠近第一个金属圈/小圆环（客户应当是发图片给你并给你说明了该松紧带应该固定的地方吧？

Dozens of analogues with modification at benzene ring were synthesized by using a metal-catalysis coupling.

另外，采用金属催化的偶联反应我们合成了苯环区取代的一系列类似物。

The effect ofα-methyl-D-mannoside and bivalence metal ion on LCA coupling to epoxy-coated magnetic particles is not significant.

研究α-甲基甘露糖及二价金属离子对其分离纯化糖蛋白的影响，二者对于凝集素与环氧磁粒的偶联并无显著影响。

The metal supporting elastic card plates optical absorption film which conductes the heat to the bottom of the heat conduction working fluid ring cavity.

金属支撑弹卡镀有光吸收膜，将热量传导于导热工质环腔管的底部。

In chapter 3, we studied the syntheses and structures of the diazene-coordinated dimetal bridging carbene complexes.

在第三章中，我们对含有杂环配位的双金属桥卡宾络合物的合成进行了初步的研究。

The metal catalyst complex has an N-heterocyclic carbene ligand, and thus, is excellent in thermal stability and reactivity.

所述金属催化剂配合物含有N-杂环卡宾配位体，因此，其具有极好的热稳定性和反应性。

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。