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The ornamental design for a new core drill bit, as shown and described. |
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FIG. 1 is an isometric view of a core drill bit showing my new design;
FIG. 2 is one side view thereof;
FIG. 3 is another side view thereof;
FIG. 4 is another side view thereof;
FIG. 5 is another side view thereof, all sides apperring diffrently;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a front view thereof.
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