Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心(样)的优越性;
Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心(样)的优越性;
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