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