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The ornamental design for Holter recorder testing device, as shown. |
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FIG. 1 is a isometric view from the front and above _of my new design for Holter recorder testing device;
FIG. 2 is a top view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is one side view of the new design, the _ opposite side being shown in FIG. 6; and
FIG. 7 is a bottom view thereof.
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