We claim the ornamental design for a drum for clothes drying machine, as shown and described.
FIG. 1 is a perspective view of a drum for clothes drying machine showing a new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a partial enlarged view of the portion 8 in FIG. 1.
The dot-dot-dash lines encircling portions of the claimed design in FIGS. 1 and 8 are illustrated in an enlargement view and form no part of the claimed design. The broken lines represent portions of the Drum for clothes drying machine that form no part of the claimed design.