Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling - Zhang - 2019 - Energy Science & Engineering - Wiley Online Library
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PDF] Trend Analysis of Drilling Technology for Top-Hammer Drilling Machine | Semantic Scholar
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Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling - Zhang - 2019 - Energy Science & Engineering - Wiley Online Library
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