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WhatsApp: +86 18203695377WEBDec 2, 2021 · Penetration rate also depends on many parameters like rock properties and specifiion of core drilling equipment (Eren and Ozbayoglu 2010; Moraveji and Naderi 2016). ... A KDR1000 machine for coal exploration drill was used in the process of coring while monitoring the relevant machine and coring variables for the depths mentioned .
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