矿井通风工 - Tapa blanda

National special operations personnel security technical training and examination the uniform textbooks: mine ventilation workers(Chinese Edition)

paperback. Condición: New. Departure the paperback. Pub Date: 2003 Publisher: China Meteorological Press national security technology training and examination of special operations personnel uniform textbooks: Mine Ventilation workers from the security technology and training to strengthen mine special operations personnel. according to the of mine special operations personnel security operation qualification assessment standards and requirements of the mine ventilation work. comprehensive introduction to the basic tec. Nº de ref. del artículo: CC041955

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