Filtration drum

Description

1. A filteration drum

1.1: Perspective

1.2: Front

1.3: Left

1.4: Top

1.5: Perspective

1.6: Cross-sectional

A back view is omitted because it is symmetrical to the front view; a right side view is omitted because it is symmetrical to the left side view; a bottom view is omitted because it is symmetrical to the top view; fig. 1.6 is a cross-sectional view cut horizontally at the center of the top view.

Claims

The ornamental design for a filtration drum, as shown and described.