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I claim the ornamental design for a switch valve, as shown and described.
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FIG. 1 is an upper perspective view of the switch valve showing my design.
FIG. 2 is a side view thereof;
FIG. 3 is an opposite side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a back view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is an upper perspective view thereof, the broken line showings being environmental only and forming no part of the claimed design; and,
FIG. 9 is an another upper perspective view thereof, the broken lines showings being environmental only and forming no part of the claimed design.
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