Non-volatile memory devices and fabrication methods thereof are provided. The locking member forms a locking portion in the locking slot. The method may also comprise selecting a portion of the compressed image on both sides of the subject. The non-homogeneous electric field produces an increased density electric field in the region of the cleavage furrow. The closure plane is defined by the base of a substantially hemispherical annular rotula member through which the hot runner body and the injector nozzle body are mutually coupled in an angularly orientable fashion. In some embodiments, the combustion chamber is folded back upon itself and has a rough, twisting interior side wall, with long, sharp protrusions extending inwardly therefrom and forming hot spots which help to provide complete combustion of the fuel mixture throughout the combustion chamber.