BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-section taken through a prior art ski structure;
FIG. 2 is a bottom plan view thereof, viewed in the direction of arrow A in FIG. 1;
FIG. 3 is a section taken along the line III-III in FIG. 2; and
FIG. 4 is a bottom plan view showing the ski with a running surface according to the invention.