????? ??? ??? ??? ??????? ??????? ????? ?? ???????? ?????????? ?? ???? ?? ???? ??? ?? ??? ??? ??????? ????, ??? ???? ?? ?? ???? ???? ?? ???? ?? ?? ?????? ??????? ?? ??? ???????????? ???? ??? ??? ??? ?????????? ?? ??????? ???? ?? ???? ??? ??? ?Under the supervision of the senior engineer, he does the upkeep of electrical appliances in the practice a