??? ????????? ?????????? ???? ??? ??????? pglsa ????????? ?????????? ?? ???????????? ??????? ??????? ????? ??????????? ???? ??? 3D ???????? ??? pglsa ??????? ??? ????????? pg????? : ???????????????????? ???? ????????? ????????????? pglisa ????? ?????????????????? ?????????? ???? ??????????????? ?????? ???????? ??? ????? ????