求英语高手翻译两个关于焊接专业英语句子,谢谢了

(1)Weldability is a much-used word ,obviously intended to describe the ease_or otherwise with which a metal may be welded .Actually,there is no recongised  method of classifying the weldabilility of the different metals-there are too many variables .However,it is possible to attempt a brief survery of those factors which affect the weability (for the fusion welding processes) of the most commonly used metals ,that is ,their thermal characteristics ,and their reaction to the application to the application of welding heat.
(2)Vacuum tube rectifiers are used in TV sets ,radio,etc .Their current rating is relatively low .They are not used in welding power supplies to any great extent .

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马了凡 6级
2008-06-20 回答
(1)可焊性这个词使用很广泛,顾名思义是说某种金属的焊接难易程度。事实上,由于金属的晶格结构不一,种类繁多,目前还没有一个公认的方法来给各种金属的可焊性分类。不过,对于一些常用的金属,那些影响该金属可焊性的因素,未尝不可简单地测量研究,这些因素包括:该金属的热力学特性,金属接受焊接热时的反应。
(2)电子管(真空管)整流器的电流额定值相对较低,适用于电视机,收音机等电器设备,不适用于大电流的焊接电源。