- Iontech Engineering Ltd.
- Copper Technologies,Zink Technologies,Solvent Extraction,Ion Exchange,Heap Dump And In-Situ Leaching,Engineering,Base Metals,Turn Key Projecting,Non-ferrous Metal.
- Address:20 Joliot Currie str.
- Ruval Jsc
- engineering, base metals, production, hydrometallurgy.
- Address:13, Tsvetan Lazarov street
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