The present invention includes a munition body and a secondary detonating device accommodated in the munition so as to be detachable from the munition, wherein the secondary detonating device is a predetermined time elapsed after the secondary detonating device is separated from the munition A high-speed flight having a main body that accommodates explosive explosives that explodes when an impact occurs, and a connection line connected to the body and the main body, respectively, to keep the distance between the projectile and the body within a preset distance upon departure from the projectile. Provides air drop bombs.
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