Anbieter: liu xing, Nanjing, JS, China
paperback. Zustand: New. Paperback. Pub Date: 2016-10-01 Pages: 212 Language: Chinese Publisher: China Mining University Press close seam-free wall for Gob theory and key technology based on application of the results at home and abroad for Gob technology . to close coal seams no wall space left along the lane to carry out research new technology scientific research. to close open seam along goaf . Bestandsnummer des Verkäufers NO057973
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