石油石化职业技能鉴定试题集:井下作业工具工 - Tapa blanda

Petroleum and petrochemical Occupational Skill Testing set of questions: underground work tools work(Chinese Edition)

paperback. Condición: New. Paperback. Pages Number The: 355 Language: Chinese underground work tools workers by the China National Petroleum Corporation Occupational Skill Testing Guidance Center according to the underground work tools work vocational qualification level standard. unified organization of the preparation of petroleum and petrochemical Occupational Skill Testing Question set a. Underground work tools work. including underground work tools work junior workers. mid-level workers. senior workers. technician. Nº de ref. del artículo: MY9565

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