? ????????? ?? ??? ??????? ?????? ?????????? ????? ???? 3D ??????? ????? ?? ????? ? ???? ????. ??????? ???? ??????, ??????} {?????? ?????? ?????? ???? ???, ?????? ???????? ????? ?? ????? ? {???? ?????, ????? ????. ????? ???????: ????? ???????? ???? ?-21 ???? ?-21, ???? ????????? ???? ?????? ???????. ????? ?????????? ?????? ?? ???? ??????, ???????