Isbn: 9787504584205 - ground pressure observation and control (security management professional)(chinese edition) (1 risultati)

paperback. Condizione: New. Paperback. Pub Date: 2010 07 Pages: 186 Language: Chinese in Publisher: China Labor and Social Security Publishing House ground pressure observation and control main line underground pressure observation and control technology. introduces roadway pressure observation and control technology coalface ground pressure observation and control technology. Ground pressure observation and control is based on mining pressure to combating major work content and capacity needs. in accordance with the th.…