Air lock for pressurized chambers

The ornamental design for an air lock for pressurized chambers, as shown.

FIG. 1 is a top perspective view of an air lock for pressurized chambers showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof.

Patent	Priority	Assignee	Title
D287264,	Apr 25 1983		Side door casing spool for an oilwell casing

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