ISBN: 9787811078633 - small and medium-sized coal mine safety training system teaching materials: of people vehicles with turner. signal work. hook work(chinese edition) (1 Ergebnisse)

paperback. Zustand: New. Paperback. Pub Date: 2008. Pages: 195 Publisher: China University of Mining Press small and medium-sized coal mine safety training system teaching materials: of people vehicles with turner. signal work. hook workers Description of people and vehicles with turner signal workers. the hook work teaching book. book content. including coal mine production safety laws and regulations. coal mine production of basic knowledge. mine ventilation and disaster prevention. people and vehicles with a turne.…