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In this study, rate of penetration (ROP) of a rotary drilling machine using two developed modeling techniques, namely, non-linear multiple regression

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The factors that have significant influence on efficiency of rotary–percussion rock drilling with downhole machines are discussed. The results

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In this study, rate of penetration (ROP) of a rotary drilling machine using two developed modeling techniques, namely, non-linear multiple regression

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estimate of rotary–percussion drilling efficiency in

The factors that have significant influence on efficiency of rotary–percussion rock drilling with downhole machines are discussed. The results

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