hornictví 40 mining 15 metallurgy 6 dějiny hornictví 5 history of mining 5 metalurgie 5 mines (mining) 4 more ... architecture 3 geological conditions 3 geologické poměry 3 history 3 mining 3 mills 3 mineral raw materials 3 ground structures 3 pozemní stavitelství 3 civil engineering 3 technical memorials 3 vodní stavby 3 water structures 3 deposits mining 2 dějiny 2 geological survey 2 industrial heritage 2 metallurgy 2 minerals 2 minerály 2 mines 2 environment protection 2 organic chemistry 2 less ...