SOFIA (Bulgaria), May 21 (SeeNews) -Â Bulgarian machine engineering company Hydraulic Elements and Systems (HES) [BUL:4HE] said on Thursday that its gross profit fell 10.9% to 2.24 million levs ($1.3 million/1.1 million euro) in the first four months of 2020, with the decrease expected to deepen to 39% in January-June.