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The ornamental design for an engine block heater extension, as shown. |
FIG. 1 is a perspective view of an engine block heater extension showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
FIG. 1 is on an enlarged scale.
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FR1419174, |
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