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