前言随着我国社会主义经济建设的加快,必将涌现许多需要特殊焊接工艺的新的应用领域,提出各种特殊焊接工艺研究的新课题。为此,更需要及时了解国外的最新发展形势,以便于借鉴。近阅有关文献、资料,看到日本在这方面的进展,颇令人瞩目,深感有予以精摘、概述的必要,俾对忙于特殊焊接工艺研究和对此感兴趣的 Preface With the acceleration of the socialist economic construction in our country, many new application fields that require special welding processes will emerge and new topics for the study of various special welding processes will be put forward. To this end, we need to keep abreast of the latest developments in foreign countries in order to learn from them. Having read the relevant literature and information recently, it is remarkable to see how Japan has made progress in this regard. It is deeply felt that it is necessary to give a summary and outline of the matter so that it may be interested and interested in studying the special welding process