FIG. 1 is a perspective view of an evacuated air chamber showing the new design;
FIG. 2 is a front elevation view, the rear elevation view, the right side elevation view and the left side elevation view being identical;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a bottom plan view thereof.
The broken lines in the drawings illustrate portions of the evacuated air chamber that form no part of the claimed design.
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