??????? 24?? 5?? ???? ??? ??γ???????? 3??????
?????????????? ????. ??? ???????? ???? ???? ???????
????247 ??ν?????? ????????? ??????? ???????? ??γ???????? ??? ???? ?? ??????. 22??(?????ð?) ???? ???? ????? ????? ????? ??
???????? 12?? ???? ?????? system)???? ??????(??γ?19) ???????. ???, ?????? ????, ???? ?????? ????? ???ν? ?????? ????? ????????
????????? 1912?? ??????. ???????? ??? ????
????????? ??????극?????? ?? ????????? ???????. ????????????, ????????? ????? ???? ???? ???? ?????? ????? ????
?
