During the 1960s, the initial industrial metal detectors have been created, they usually have been greatly employed for mineral prospecting and various industrial uses.???? ??? ??????? ?????? ?? ???? ???? ????? ??????? ???? ?????? ??? ???? ????? ?????? ???? ????? ???? ????? ??? ?? ?????? ??? ?????? ??????? ???????? ?????? ???? ??? ????? ????? ????.