Idioma: Chino
Publicado por Metallurgical Industry Press, 2016
ISBN 10: 7502471499 ISBN 13: 9787502471491
Librería: liu xing, Nanjing, JS, China
EUR 72,58
Cantidad disponible: 5 disponibles
Añadir al carritopaperback. Condición: New. Paperback. Pub Date: 2016-02-01 Pages: 178 Language: Chinese Publisher: Metallurgical Industry Press big mining height fully mechanized Caving Face of Coal wall spalling mechanism and control of the big mining height fully mechanized Caving Face of Coal Wall mechanism made a thorough research. the reasonable and effective and targeted coal wall spalling control technology. The book of coal wall in front of the plastic zone has been systematically studied. we reached a different hardness and p.