TY - CPAPER AU - Pavel Schmidt AU - Vlastimil Moni AU - Petr Klouda TI - DEGRADATION OF THE STATE OF A BALL TRACK AT THE ZP 6600 T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining PY - 2017 SP - 181 EP - 188 DO - 10.5593/sgem2017/13/s03.024 PB - STEF92 Technology ER -