Gas filling machine

FIG. 1 is a front view of the gas filling machine of the present invention showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top left perspective view thereof; and,

FIG. 8 is a top left perspective view thereof.

The broken lines shown in FIGS. 1 - 8 represent portions of a filling machine alone or in combination with a filling nozzle and form no part of the claimed design.