The ornamental design for a flow-through screen, as shown and described.
FIG. 1 is a side perspective view showing the flow-through screen;
FIG. 2 is a top view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a bottom-view thereof;
FIG. 5 is a back view thereof;
FIG. 6 is a close-up view thereof;
FIG. 7 is a right side view thereof; the left side view being a mirror image of the right side view;
FIG. 8 is a cross-sectional view of the wall, taken in the direction of line 8-8 in FIG. 6
FIG. 9 is a cross-sectional view of the wall, taken in the direction of line 9-9 in FIG. 6; and,
FIG. 10 is a cross-sectional view, taken in the direction of line 10-10 in FIG. 3.
The surface shading is for purposes of illustrating the contour and appearance of the claimed surfaces upon which it is illustrated. The broken lines are used to show unclaimed portions of the invention and form no part of the claimed design.