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ISBN 10: 7564617136ISBN 13: 9787564617134
Librería: liu xing, Nanjing JiangSu, JS, China
Libro
paperback. Condición: New. Pub Date: 2013-02-01 Pages: 284 Language: Chinese Publisher: China Mining University Press underground drilling workers Beginner Intermediate Advanced coal industry to identify specific types of vocational skills training materials. introduced the beginner. intermediate. advanced coal mine drillers professional skill requires knowledge and skill requirements. Including basic knowledge workers underground drilling rig operations. rig removal and installation. drilling fault and incident handli.