Isbn: 9787562440437 - 电焊工 (1 risultati)

paperback. Condizione: New. Language:Chinese.Paperback. Publisher: Chongqing University Pub. Date :2007-05-01. This book is one of the series of construction workers. This book is a combination of the actual situation of construction industry professionals. welders national occupational standards and norms. and national safety standards for welders written. A total of 10 tasks. the main contents include an introduction to welding and welding drawings. the metal material and heat treatment process. knowledge of safe use .…