The ornamental design for an automatic handwashingmachine, as shown and described.
FIG. 1 is a first perspective view of an automatic hand washing machine showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines shown in the drawings depict portions of the automatic hand washing machine in which the design is embodied that form no part of the claimed design.