????? ?? ??????? ????? ?? ??????? (Letter of Credit ?? LC) ??? ???? ?????? ???? ?? ????????? ??????? ??????? ?????? ????? ?????? ??????? ??? ????? ????? ????? ?????? ?????? ???? ???? ??? ??????? ??????????? ???????? ??????? ??? ?????? ???????? ??? ?????? ??????? ???? ??????? ??? ??? Letter of Credit ?????? ???????? ????? ??????? ????? ?? ??????? ??