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The ornamental design for a drain pipe, as shown and described. |
FIG. 1 is a perspective view of a drain pipe showing my new design;
FIG. 2 is an elevational view taken from one side thereof;
FIG. 3 is an elevational view taken from one end thereof;
FIG. 4 is an elevational view taken from the side opposite that shown in FIG. 2;
FIG. 5 is an elevational view taken from the end opposite that shown in FIG. 3;
FIG. 6 is a top plan view thereof; and
FIG. 7 is a bottom plan view thereof.
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