LI Shi-min, GUO Ke-qin. THE RESEARCH OF REVERSE CIRCULATION DOWNHOLE DRILLING WITH DOUBLE-TUBE ROD[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(2): 56-58,71,72.
Citation:
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LI Shi-min, GUO Ke-qin. THE RESEARCH OF REVERSE CIRCULATION DOWNHOLE DRILLING WITH DOUBLE-TUBE ROD[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(2): 56-58,71,72.
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LI Shi-min, GUO Ke-qin. THE RESEARCH OF REVERSE CIRCULATION DOWNHOLE DRILLING WITH DOUBLE-TUBE ROD[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(2): 56-58,71,72.
Citation:
|
LI Shi-min, GUO Ke-qin. THE RESEARCH OF REVERSE CIRCULATION DOWNHOLE DRILLING WITH DOUBLE-TUBE ROD[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(2): 56-58,71,72.
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