liang guo jun sheng deng (3 Ergebnisse)

paperback. Zustand: New. Paperback.Pub Date:2022-12 Pages:148 Language:Chinese Publisher:China University of Mining and Technology Press The western mining areas of my country are rich in thick and extra-thick coal seams. which are suitable for full-thickness mining with large mining height. However. with the increase of mining height. the working face pressure is enhanced. the impact of roof and the frequency of coal wall spalling gradually increase. which puts higher requirements on the key support equipment hydrau.

paperback. Zustand: New. Paperback. Pub Date :2014-02-01 Pages: 285 Language: Chinese Publisher: Southwest Jiaotong University Press. Tunnel Engineering Geology from the nature and mission of the tunnel engineering geology. engineering geology development discourse tunnel starting. detail a basic knowledge of geology and tunnel engineering geology related. from the construction of geological disasters. adverse geological bodies and their relations discussed tunnel geological problems. from a research survey and desig.

paperback. Zustand: Good. Paperback. Pub Date: 2010 Publisher: the Shanxi Art Academy Wu Hao; Wang Zhiying; Liang Haifu; Guojun Sheng; Ren Xiaojun; tension; Huo Jun-its; Wangchao Rui Zhou Honghai; Sun Haiqing '; Hao Snow; king how; Liqing Fu; Wang Xuehui; Wang Yihong 15 artists;