A Study of the Lead-free Hot Air Solder Leveling Process

Development of Sintering Alloy Steel Valve Seat for lead-free Petrol Engine

无铅汽油发动机高性能烧结合金钢气门座的研制

Soldering technology for Lead-free and problems in its application

无铅焊接技术及其在应用中存在的问题

Mechanical Test and Analysis on the Reliability of Lead-Free BGA Packaging

无铅BGA封装可靠性的力学试验与分析

Studies on New Lead-Free Piezoelectric Ceramics and Their Applications in Filters

新型无铅压电陶瓷及其在滤波器上的应用研究

The Application of Orthogonal Experiment to the Composition Design of Lead-free Brass

正交试验法在无铅黄铜成分设计中的应用

Analyze the effect of Lead-free to the domestic Ceramic Filter production.

最后分析了无铅化生产对国内陶瓷滤波器的影响。

These results provide guidance for development lead-free piezoelectric ceramics with high properties.

这些结果对开发高性能的铌酸钾钠基无铅压电陶瓷具有一定的指导意义。

Research development of high temperature lead-free solders for electronic assembly

电子组装用高温无铅钎料的研究进展

Development and Trend of Lead-Free Technology for Electronic Assembly Manufacturing

电子组装生产的无铅技术与发展趋势

Plans are in hand to hospitalize the worst-affected cases, but they will then need to be able to return to a lead-free environment.

正在研究计划，将最重的病例收住入院，但在此后，这些病例需要能够回到无铅的环境中。

And when the workshops are light and clean and airy, when the tool storage system is well planned and when the right equipment is always handy then it ′ s easier to do the job well.

当维修站拥有明亮、干净、通风良好的工作环境，当工具储存系统井井有条，当所需设备始终方便易用时，工作人员将更容易做好工作。

Ms Ma's light and airy factory, in Kigali, the capital, is located in a new government-backed special economic zone, which offers reliable power and water, good road links and land.

Candy的工厂明亮而通风，坐落在首都基加利一个政府支持的新成立的经济特区里，那里有稳定的电力、水和土地供应，交通便利。

A collection of glass vases in varying shapes and sizes adds interest to a white credenza while keeping things light and airy.

一系列形状各异，大小不同的玻璃花瓶，为白色餐柜带来了亮点，同时又保持了空间明亮、通畅的感觉。

The workspace is light and airy and built around the concept of working in teams, people sharing offices and cubicles connected in groups.

工作区是明亮的而通风的，它的建造理念是大家协手工作。人们共享相连在一起的办公室和小卧室。

The whole house was beautifully light and airy.

整座房子的采光和通风都非常好。

Our new offices are light and airy.

我们的新办公室通风透亮。

Started by daylight, Next morning light and airy.

当晨风和阳光抚慰时，翌日重新来临；

That is, of course, because Europe has so demonstratively shown that they know how to manage their own affairs, including the Euro and the welshers known as the Greeks, the Portugese, and the Irish.

这当然是因为欧洲已用事实展现出他们知道如何管好自己的事务，包括欧元以及希腊、葡萄牙和爱尔兰等赖账人。

This papar takes province of Shandong for example, and analyzes demonstratively the status of rural compulsory education after rural tax-fee reform in this province. Finally, this paper brings forward corresponding suggestions and countermeasures to accelerate the development of rural compulsory education.

以山东省为例，对农村税费改革后该省的农村义务教育发展状况进行实证分析，并立足实际，提出了推动我国农村义务教育健康发展的对策和建议。

The minimum entropy production object equation is established to realize the optimal planning of hydropower energy system power generation. Optimal solution of the object equation can be achieved demonstratively according to the convex programming principle and convex function property.

建立了系统电站发电量优化规划即熵增最小目标方程，应用凸规划原理及凸函数性质论证了目标方程存在最优解；