PDF(80 KB)
Trial Study on Medium-length Ring Blasting Subdrifting
LI Qi-yue, LI Xi-bing, ZHU Chang-yu, XIAO Jian-hua
Mining and Metallurgical Engineering ›› 2001, Vol. 21 ›› Issue (2) : 78-79.
PDF(80 KB)
PDF(80 KB)
Trial Study on Medium-length Ring Blasting Subdrifting
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