ISBN: 9787502496487 - research and application of gas control technology for u-shaped ventilation coal mining face in high gas coal mine chen zhong metallurgical industry press 9787502496487(chinese edition) (1 risultati)

paperback. Condizione: New. Language:Chinese.Paperback. Pub Date: 2023-10 Pages: 116 Publisher: Metallurgical Industry Press Research and Application of Gas Control Technology for U-shaped Ventilation Coal Mining Face in High Gas Mines takes the mining of Jingfu Coal Mine as the background. and demonstrates the good working ability of U-shaped ventilation to control gas through a large amount of practical data. The book is divided into 7 chapters. and the main contents include introduction. analysis of gas sources in co.…