The machine and method are particularly suited for measuring the coefficient of {HEAD ~ friction} between a rubber specimen or {TAIL ~ a tread element} and different friction surfaces at different sliding velocities, contact pressures and orientations 
between
The machine and method are particularly suited for measuring the coefficient of { HEAD ~ friction } between a rubber specimen or { TAIL ~ a tread element } and different friction surfaces at different sliding velocities , contact pressures and orientations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH