Isbn: 9787807346876 - 典型瓦斯地质灾害与防治 (1 risultati)

paperback. Condizione: New. Language:Chinese.Pages Number: 220 Publisher: Yellow River Water Conservancy Press Pub. Date :2009-07. China s mining industry is mining geology The most frequent disasters. one of the industries. Henan is China s coal-producing province. is the country s leading gas hardest hit province. more than 50% of the coal mine for the high gas or coal and gas outburst. Conducted a special study of this book. selected since the founding of New China in Henan Province. a large number of geological disa.…