DRILL-EXPLODING TECHNOLOGY AND CPMBINED DIGING SYSTEM
LI WEILIAN, LI WANLIAN, YU GUOQIANG, ZHANG JINFENG, SUN SHOUTEN, ZHUANG GUIRONG LIU KAIYI, GU RISHEN, CHEN ZHIPING
Year of Publication 10.03.1986
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Year of Publication 10.03.1986
Patent