US D277223 S
FIG. 1 is a reduced perspective view of a gas pressure differential measuring system orifice fitting showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof; and
FIG. 4 is a bottom plan view thereof.
The pipes are shown broken away in FIGS. 1, 2 and 4 to indicate indeterminate length.