《无损探伤》Ⅲ级教材自出版发行以来深受大专院校(包括中等专业学校)师生、研究院(所)及厂矿从事无损探伤和设计、工艺等专业人员的欢迎。本书已被许多省、市、自治区劳动局作为无损探伤Ⅲ级培训班的教材,并取得了较好的效果。第一次出版发行的《无损探伤》Ⅲ级教材已全部售完,但至今仍有许多省、市、自治区劳动局及厂矿企业来函来电来人要求订购。为了满足广大读者的要求,并配合《无损探伤》Ⅲ级资格鉴定工作的全面展开,我编辑组决定在原教材的基础上,请作者进行全面修订,然后再 Non-destructive testing grade III textbooks have been well received by faculty, students, institutes (institutes) and factories and mines of non-destructive testing, design and craftsmanship in universities and colleges (including secondary specialized schools) since the publication and issuance. The book has been many provinces, municipalities and autonomous regions, Labor Bureau as non-destructive testing level III teaching materials, and achieved good results. The first published “non-destructive testing” Ⅲ grade teaching materials have been sold out, but so far there are still many provinces, municipalities and autonomous regions, labor bureau and factories and mines letter calls 来人 asked to order. In order to meet the requirements of readers, and with the “NDT” Ⅲ level qualification work in full swing, my editorial team decided on the basis of the original textbooks, please author for a full revision, and then