The ornamental design for a plow assembly, substantially as shown and described.
FIG. 1 is a perspective view of the plow assembly of my design as seen from
an upper rear right side point of perspective. A view seen from a like but
left side point of perspective would be identical, except that it would be
a mirror image of the view shown in FIG. 1.
FIG. 2 is a perspective view as seen from the lower rear right side of the
plow assembly. A view as seen from the lower rear left side of the _plow
would be a mirror image of the view shown in FIG. 2.
FIG. 3 is an enlarged perspective view as seen from one side of the front
of the plow assembly, with the portion behind the extreme front portion of
the plow assembly being broken away. A view of that portion of the plow
shown in FIG. 3 as seen from the opposite front side to that of the point
of view of FIG. 3 would be a mirror image of the view shown in FIG. 3.