The ornamental design for a door for drum washingmachine, as shown and described.
FIG. 1 is a perspective view of a door for drum washing machine, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is another side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is another perspective view thereof in an environment of use.
The broken lines in the figures illustrate portions of the door for drum washing machine that form no part of the claimed design. The additional broken lines in FIG. 8 illustrate environment that form no part of the claimed design.