BANJA LUKA (Bosnia and Herzegovina), July 31 (SeeNews) – Czech civil engineering companies ZVVZ-Enven Engineering (ZEE) and ZK-Termochem Praha have signed a 9.6 million euro ($11.3 million) contract to supply electric filters to Bosnian coal miner and energy producer RiTE Ugljevik [BANJ:RTEU-R-A], Czech media reported.