查询词典 expansion ring

Radical ring expansion is a new strategy to synthesize the medium-sized and even large rings, nowadays, it is one of the important research fields of organic chemistry.

研究利用自由基引发的定向扩环和成环反应则是当今有机合成的前沿领域之一。

Expansion of the inner ring due to interference fit on shaft.

扩大内环由于干扰适合轴。

The chemical ring expansion is complex and expensive, and causes a significant negative environmental impact. Therefore, an enzymatic reaction is greatly desirable to replace such chemical reaction.

由於这种化学扩环不仅制程复杂，而且会对环境造成相当程度的损害，因此一种利用酵素的生物扩环法取代目前的化学法是被高度期盼的。

Difficulties encountered in the demolition, we recommend that you use the demolition of the instrument simultaneously pull outward on the inner ringcareful hot oil, thermal expansion will bearing inner ring, making it easier to fall off.

在拆卸遇到困难时，建议您使用拆卸工具向外拉的同时向内圈上小心的浇洒热油，热量会使轴承内圈膨胀，从而使其较易脱落。

The Yangtze River, Wuhan Hanshui will naturally be divided into three towns, Wuhan, it is not easy to form centralized regional hot spots in real estate, real estate development to stay in the more primitive the development of point-axis, that is, transport, road-led regional development, such as Xu, development along the Avenue, and so on, without the formation of layer-style development, that is, ring expansion, a typical Beijing.

长江，武汉汉水自然会分为三个城镇，武汉，是不容易形成集中的地区热点，房地产，房地产开发留在更原始的发展，点轴，也就是说，运输，公路带动区域发展，如许，发展大道沿线等，没有形成层式发展，这就是环扩张，一个典型的北京。

Through a special experimental rig of testing flow characters of electronic expansion valve based on liquid ring method,some influence factors such as outlet pressure,inlet pressure,inlet subcooling,valve opening,inlet density and outlet quality to valve flow characteristics were tested...

结果表明：上述参数对电子膨胀阀的流量特性均有一定的影响，但各参数的影响程度不同；开度是改变质量流量的主要因素，并反映出阀的调节特性。

The rearrangement of bicyclic cyclobutylcarbinyl radicals could undergo both ring opening and expansion pathway.

双环环丁基甲基自由基既可能进行开环也可能发生扩环过程。

The test shows that the butt friction welding process of copper and stainless steel bar can be divided into the following stages approximately: the adhesion at the beginning of friction,friction inside the copper,the expansion of the plastic ring and the friction on the bound surface of copper-stainless steel and the friction in stainless ...

结果表明铜与不锈钢棒料的对接摩擦焊过程大致可分为初始摩擦的粘着；铜内摩擦、塑性环扩展；铜、不锈钢界面摩擦及不锈钢体内摩擦3个主要阶段。在接头形成过程中经历了两次摩擦面的转移。其内容对促进异种材料摩擦焊的接头形成机理研究有积极的作用。

Jiangxi Province Environmental Protection Agency recently issued a "strict construction projects on the further approval of the EIA notification," the Prohibition of the new project EIA approval, construction projects within the region to implement regional limits approved environmental impact assessment, environmental law new business, expansion and renovation projects Ring suspend the approval of evaluation be clearly defined.

江西省环保局日前发出&关于环境影响评估的通知，进一步严格审批建设项目&，禁止新项目环评审批，区域内建设项目实施区域限制，经批准的环境影响评价，环境法的新业务，扩建和改建项目环评价暂停批准予以明确界定。

Before conducting the study, students believed that Heat could not influence gas and liquid volume.Matter didn't have thermal expansion. Metal ring's diameter will shrink after heating. The melting quantity of salt is much quicker and faster than sugar in the same temperature or water. Only metals can conduct heat, but not wood, glass, plastics. The quantity of heat is by steam way disappearing.

一、学童对「物质与热」的迷思概念有：(1)「热对气体、液体体积不会有影响」的概念，(2)听过热胀冷缩的语词，但是对原因不明了，(3)金属双圆环加热后，内环孔的口径会变小，(4)同温度且等量水，盐的溶解量比糖多、也比糖快；(5)木材、塑胶、玻璃不会传热，金属才会传热；(6)以为热量是以水蒸气方式散失，(7)冷气机应安装在高处，冷房效果较佳；(8)误认为金属是良好的保温材质。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。