FIG. 1 is a perspective illustration of a portion of a mask elbow according to our design;
FIG. 2 is different perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a right side view thereof with the left side view being a mirror image thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
Where included, broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design.
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