???? ???? ?????? ?????? ?? ???? ????? ???????? ????????? ? ????? ???? ????? ????? ?????? ???????? ? ??? ????? ???? ???????? ??????? ??????? ?? ????? ????? ???? ?? ???????? ??????? ??? ???? ?????? ??????? ??? ????? ?????? .The most common form of steel detector is actually a hand-held metal detector or coil-dependent detectors applying oval-shaped d