Combined sample tube, screw cap and marking plug
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FIG. 1 is an exploded perspective view of the combined sample tube, screw cap and marking plug showing my new design;
FIG. 2 is an elevational side view thereof in an assembled state, the opposite elevational side view being identical;
FIG. 3 is a cross-sectional view therethrough as seen along line 3--3 in FIG. 5;
FIG. 4 is a bottom plan view thereof; and
FIG. 5 is a top plan view thereof.