采煤工掘进工 - Tapa blanda

Coal mining work boring workers(Chinese Edition)

paperback. Condición: New. Paperback. Pub Date: 2007 Pages: 248 Language: Chinese in Publisher: Coal Industry Press the main content of the coal mining workers excavation work including: policies and laws and regulations of coal mine production safety. mine ventilation. disaster prevention and disaster prevention in aid knowledge coal mining technology. drilling and blasting operations. security technology. coal face roof management Heading Face roof management. mining electromechanical transportation safety knowledge. Nº de ref. del artículo: CC071598

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