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该稿系已回国的焊接专家B.磊查柯夫根据我国一些焊接工作者的请求,给编辑部的一封信,并回答了这个问题 许多中国同志写信问我并要我回答
This manuscript has been returned to the welding expert B. Lei Cha Ke Fu, according to some of our welding workers at the request of a letter to the editorial department and answered the question many Chinese comrades asked me and asked me to answer