SOFIA (Bulgaria), October 27Â (SeeNews) -Â Bulgarian machine engineering company Hydraulic Elements and Systems (HES) [BUL:4HE] said on Tuesday that its net profit edged down to 3.5 million levs ($2.1 million/1.8 million euro) in the first nine months of the year from 3.6 million levs in the same period of 2019.