US D292215 S
FIG. 1 is a front and top perspective view of a fluid filtration unit for use in oil well hole drilling operations showing my new design;
FIG. 2 is a rear left side and top perspective view thereof;
FIG. 3 is a top plan view thereof; and
FIG. 4 is a rear right side and top perspective view thereof.
The broken-line showing of the wheel assembly in FIGS. 1, 2 and 4 is for illustrative purposes only and forms no part of the claimed design. The partial surface treatment on the bottom platform is understood to cover the entire platform surface.