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Book Description paperback. Condition: New. Language:Chinese.Paperback. Pages Number The: 648 National Professional Training Tutorial: electrolytic refining workers led by the China Nonferrous Metals Industry Association. the organization of non-ferrous metal industry. the Occupational Skill Testing Center of Zhuzhou Smelter Group Co. Ltd. prepared. with a certain authority. Content to follow the professional activities. vocational skills as the core guiding ideology. highlighting the vocational training features. the book applies to. Seller Inventory # MY9420