We claim the ornamental design for a portion of a support system for dental equipment, as shown and described.
FIG. 1 is a right side perspective view of a portion of a support system for dental equipment.
FIG. 2 is a side view of the left side of the support system of FIG. 1.
FIG. 3 is a top view of the support system of FIG. 1.
FIG. 4 is a front view of the support system of FIG. 1.
FIG. 5 is a right side view of the support system of FIG. 1; and,
FIG. 6 is a rear view of the support system of FIG. 1.
The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. The bottom forms no part of the claimed design.