FIG. 1 is a front perspective view of a juicing machine of our new design shown in environment; FIG. 2 is a left side view thereof; FIG. 3 is a right side view thereof; FIG. 4 is a back view thereof; FIG. 5 is a front view thereof; FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof. The portions of the drawings shown in broken lines form no part of the claimed design.