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			 The ornamental design for a pressure clearing device for cleaning conduits, as shown and described.  | 
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FIG. 1 is a left side elevational view of the pressure clearing device for cleaning conduits, showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a perspective view thereof;
FIG. 5 is a right side elevational view corresponding to the side opposite shown that in FIG. 1;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
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