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The ornamental design for an oil and gas mixing funnel, as shown and described. |
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FIG. 1 is a perspective view of an oil and gas mixing funnel showing my new design;
FIG. 2 is a left side elevational view;
FIG. 3 is a top plan view;
FIG. 4 is a bottom plan view;
FIG. 5 is a front elevational view; and
FIG. 6 is a rear elevational view thereof.
FIG. 1 has been drawn on a reduced scale with respect to FIGS. 2-6.
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