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Occupational Skill Testing Question of petroleum and petrochemical set: pipe network maintenance work(Chinese Edition)
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paperback. Zustand: New. Paperback Pages Number: 266 Language: Chinese petroleum and petrochemical Occupational Skill Testing Question set: pipe network maintenance work is based on the pipe network maintenance workers vocational qualification level standards by the China National Petroleum Corporation Occupational Skill Testing Guidance Center. the unified organization of the preparation of Occupational Skill Testing Authority of the petroleum and petrochemical questions set in a. Petroleum and petrochemical Occupat. Bestandsnummer des Verkäufers MY9464
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