The transmission ratio is set by defining a continuously variable pivoted position of {HEAD ~ the intermediate roller} between {TAIL ~ the input disk} and the output disk 
between
The transmission ratio is set by defining a continuously variable pivoted position of { HEAD ~ the intermediate roller } between { TAIL ~ the input disk } and the output disk
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH