ZHAO Da-jun, WU Xiao-han, XU Long-xian, YU Ping, JI Sheng-li. Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing[J]. COAL GEOLOGY & EXPLORATION, 2006, 34(1): 79-80.
Citation:
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ZHAO Da-jun, WU Xiao-han, XU Long-xian, YU Ping, JI Sheng-li. Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing[J]. COAL GEOLOGY & EXPLORATION, 2006, 34(1): 79-80.
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ZHAO Da-jun, WU Xiao-han, XU Long-xian, YU Ping, JI Sheng-li. Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing[J]. COAL GEOLOGY & EXPLORATION, 2006, 34(1): 79-80.
Citation:
|
ZHAO Da-jun, WU Xiao-han, XU Long-xian, YU Ping, JI Sheng-li. Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing[J]. COAL GEOLOGY & EXPLORATION, 2006, 34(1): 79-80.
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