W01 Friction Wheels with Parallel Axes
W01
 
W02 Friction Wheels with Parallel Axes
W02
 
W03 Friction Wheels with Parallel Axes and Grooved Wheel
W03
 
W04 Grooved Friction Wheels with Parallel Axes
W04
 
W05 Friction Wheels with Transverse Axes and Grooved Wheel
W05
 
W06 Grooved Friction Wheels with Parallel Axes
W06