Rotary core drilling

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Under rotary coring means the drilling with a drilling tool driven by rotary movement for the extraction of core samples.

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Origin: from http://geotip.igt.ethz.ch/index.php?&gfield=knowledge&gmenuleft=blocs&gblocid=64&PHPSESSID=01n86ctd7qnbo419v4k9i2dsk3 - Kurator71  ( D ) 10:53, Aug. 20, 2020 (CEST)