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An ornamental design for telephone exchanger, as shown and described. |
FIG. 1 is a left side, top and front perspective view of a telephone exchanger showing my new design in cradled relationship;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a top plan view thereof; and
FIG. 7 is a bottom plan view thereof.
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