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