| RESEARCH AND DEVELOPMENT OF DOWN-THE-HOLE HAMMER IN CHINA |
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| 作者姓名： | Liu Guangzhi |
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| 作者单位： | Liu Guangzhi (China Coordinator，CC-4 Group，ILP; Member of China Academy of engineering) (Higher Consulting Commission of Scientific and Technological Committee，Ministry of Geology and Mineral Resources，Xisi，Beijing 100812，China) |
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| 摘 要： | ＲＥＳＥＡＲＣＨＡＮＤＤＥＶＥＬＯＰＭＥＮＴＯＦＤＯＷＮ┐ＴＨＥ┐ＨＯＬＥＨＡＭＭＥＲＩＮＣＨＩＮＡＬｉｕＧｕａｎｇｚｈｉ（ＣｈｉｎａＣｏｏｒｄｉｎａｔｏｒ，ＣＣ－４Ｇｒｏｕｐ，ＩＬＰ；ＭｅｍｂｅｒｏｆＣｈｉｎａＡｃａｄｅｍｙｏｆｅｎｇｉｎｅｅｒｉｎ...
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| 关 键 词： | hydrohammer downthehole hammer rock breakage mechanism |
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