????? ??? ??(50·??)? ????? ?? ??? ??? 25? ????? ??? ??? ???? ?? ??? ???. ? ??? ??? ??????? CN???????(CNC)? ‘???? ????’ ??? ?? ?? ?????? ??1?(?? ???)? 21? “? ???? ??? ????? ? ??? ???? ?? ‘?? ??? ?? ??? ???? ???’? ????”? 24? ???. ??? ?? ??? ????, ? ?? ?? ?? ??? ???? 25? ??? ????. ??????? ??? ? ???? ?????? ??? ???? 2010? ????? 4·11?? ?? CNC? ????? ??? ????? ???? ????? ??? ??.