电焊工 - Tapa blanda

welders practical skills of migrant construction workers Series(Chinese Edition)

paperback. Condición: 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 . Nº de ref. del artículo: H35124

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