???? ????
??? ???? ??? ? stringent SAE J1495-2018 ????? ?????? ??????? ???????? ?????? ??? ???? ?? ???? ??? ????? ????? ????? ????? ??????? ???? ???-??? ???? (?2.5% ??? ???) ?????? ??? ?????? ??? ????? ???? ?? ???????? ????? ??? ???? ?????? ?????? ????? ????? ????? ?? ????? ????? ?12 ??? ???? ???? ??? ??????? ??????? ????? ?? ????? ??? ????? ????? ??????? ??????? ? IEC60254 ????? ???? ?400 ???? ?????? ?????? ???? ?? ??? ???? ?????? ????? ????? ??? ?????? ??? ?????? ?? ????? ????? ???? ????? ???? ???????