Literature Cited
É. A. Vakher, “The use of multiple-spindle drilling rigs in open-cut mines,” Tr. In-ta Slantsev SNKh ÉSSR, No. 15 (1966).
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Additional information
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 3, pp. 133–137, May–June, 1969.
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Freidina, E.V. Productivities of multiple-hammer drills. Soviet Mining Science 5, 359–363 (1969). https://doi.org/10.1007/BF02501881
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DOI: https://doi.org/10.1007/BF02501881