Detailed Notes on UTLH

????? UTLH ??? ????? ???? ?? ????? ???? ?? ????? ???? ?? ???? ??????? ???? ??????? ??????????? ???? ??, ?????? ??? ?? ??????? ???? ???, ?? ?????? ???????? ???? ?? ??? ????????? ?? ?? ???? ??? ??? ???? ??? ?? ?? ?????? ?????? ??? ???? ?????, ?????? ?????? UTLH ????? ?? ???????????? ?? ??? ???? ?? ??? ????? ???? ???