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The ornamental design for an electrical heating device, as shown and described.
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FIG. 1 is a front view of an electrical heating device showing my new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left side view thereof; and,
FIG. 6 is a right side view thereof.
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